By making the mountains of the Bernese Oberland accessible by train and cable car, Swiss engineers paved the way for visitors to this popular region to explore some of the most scenic and enjoyable spots in the country. There are many organized excursions, as adventurous as they are varied, and Interlaken is the most sensible starting point.

Jungfraujoch

A train trip to Jungfraujoch, at 3,400m (11,152 ft.), is often considered a trip highlight by visitors. For more than a century, it's been the highest railway station in Europe. It's also one of the most expensive: A round-trip tour costs 198F in first class, 186F in second class. However, families can fill out a Junior Card form, available at the railway station, which allows children 16 and under to ride free. Departures are usually daily at 8am from the east station in Interlaken; expect to return around 4pm. To check times, contact the sales office of Jungfrau Railways, Höheweg 37 (tel. 033/828-72-33; www.jungfraubahn.ch).

With luck, you'll get good weather for your day trip; you should always consult the tourist office in Interlaken before boarding the train. The trip is comfortable, safe, and packed with adventure. First you'll take the Wengernalp railway (WAB), a rack railway that opened in 1893. It will take you to Lauterbrunnen, at 784m (2,572 ft.), where you'll change to a train heading for the Kleine Scheidegg station, at 2,029m (6,655 ft.) -- welcome to avalanche country. The view includes the Mönch, the Eiger Wall, and the Jungfrau, which was named for the white-clad Augustinian nuns of medieval Interlaken (jungfrau means "virgin").

At Kleine Scheidegg you'll change to the highest rack railway in Europe, the Jungfraubahn. You have 9.6km (6 miles) to go; 6.4km (4 miles) of that will be spent in a tunnel carved into the mountain. You'll stop briefly twice, at Eigerwand and Eismeer, where you can view the sea of ice from windows in the rock (the Eigerwand is at 2,830m/9,282 ft., and Eismeer is at 3,110m/10,201 ft.). When the train emerges from the tunnel, the daylight is momentarily blinding, so bring a pair of sunglasses to help your eyes adjust. Notorious among mountain climbers, the Eigernordwand ("north wall") is incredibly steep.

Once at the Jungfraujoch terminus, you may feel a little giddy until you get used to the air. There's much to do in this eerie world high up Jungfrau, but take it slow -- your body's metabolism will be affected and you may tire quickly.

Behind the post office is an elevator that will take you to a corridor leading to the famed Eispalast (Ice Palace). Here you'll be walking inside "eternal ice" in caverns hewn out of the slowest-moving section of the glacier. Cut 19m (62 ft.) below the glacier's surface, these caverns were begun in 1934 by a Swiss guide and subsequently enlarged and embellished with additional sculptures by others. Everything in here is made of ice, including full-size replicas of vintage automobiles and local chaplains.

After returning to the station, you can take the Sphinx Tunnel to another elevator. This one takes you up 107m (351 ft.) to an observation deck called the Sphinx Terraces, overlooking the saddle between the Mönch and Jungfrau peaks. You can also see the Aletsch Glacier, a 23km (14-mile) river of ice -- the longest in Europe. The snow melts into Lake Geneva and eventually flows into the Mediterranean.

Astronomical and meteorological research is conducted at a scientific station here. There's a research exhibition that explains weather conditions, and a video presentation.

There are five restaurants from which to choose. The traditional choice is Jungfraujoch Glacier Restaurant. Top of Europe, opened in 1987, offers several different dining possibilities, and there's also a self-service cafeteria. As a final adventure, you can take a sleigh ride, pulled by stout huskies.

On your way back down the mountain, you'll return to Kleine Scheidegg station, but you can vary your route by going through Grindelwald, which offers panoramic views of the treacherous north wall.

Harder Kulm

For a somewhat less ambitious excursion, set out from Interlaken East for this belvedere at 1,301m (4,267 ft.). The funicular ride takes 15 minutes and costs 27F round-trip for adults and 14F for children. From the lookout, you can see Interlaken, the Bernese Alps, and the two lakes, Thun and Brienz, that give Interlaken its name. Departures are every half-hour daily from May until the end of October. The first funicular departs at 9:10am, the last one back leaving at 6pm (6:30pm Apr-Oct). There's a mountain restaurant at Harder Kulm, with observation terraces. For details, call tel. 033/828-72-03.

Wilderswil/Schynige Platte

Less than 3km (2 miles) south of Interlaken, Wilderswil stands on a plain between lakes Brienz and Thun, at the foot of the Jungfrau Mountains. It's both a summer resort and a winter resort, as well as the starting point for many excursions. The resort has 16 levels of accommodations, ranging from hotels to guesthouses, but most tourists stay in Interlaken and visit Wilderswil to take the excursion to Schynige Platte (tel. 033/822-34-31; www.schynigeplatte.ch). To get to Wilderswil, take the 6-minute train ride from the Interlaken East station. Switch to a cogwheel train for the harrowing, steep ascent to the Schynige Platte, at 1,936m (6,350 ft.). The rack railway, which opened in 1893, climbs the 7km (4 1/2-mile) slope in less than an hour, with gradients of up to 25%. There are more than a dozen trips a day in season, June to October, costing 69F round-trip.

There's an alpine garden in Schynige Platte, containing some 600 species of plants; admission is 5F. From a nearby belvedere, visitors command a splendid view of the Eiger, Mönch, and Jungfrau. The resort's restaurant serves good food and drink.

Lake Thun

Occupying an ancient terminal basin of a glacier, Lake Thun (Thunersee) was once connected to Lake Brienz (Brienzersee). The Lutschine River deposited so much sediment at Interlaken that the one body of water eventually became two. Lake Thun, once beloved by Brahms, is 21km (13 miles) long and 3km (2 miles) wide. The lake is 27km (17 miles) south of Bern and there is frequent rail service, which continues east to Interlaken.

Because of its mild climate, Lake Thun is known as the Riviera of the Bernese Oberland. Popular lake sports include water-skiing, yachting, and windsurfing. Onshore are excellent swimming pools (indoor and outdoor), windsurfing schools, golf courses, tennis courts, horse stables, and caves.

The lake's major resort is Thun, a small city that was founded on an island where the Aare River flows out of Lake Thun. The city has since expanded onto the banks of the river to become the political and administrative center of the Bernese Oberland and the gateway to the Bernese mountains.

The most interesting part of the city is on the Aare's right bank. The busy main street, Hauptgasse, has walkways built above the arcaded shops. There's a 17th-century town hall on Rathausplatz, where you can climb a covered staircase up to the formidable Schloss Thun (Castle Kyburg). The castle is now a historical museum (tel. 033/223-20-01; www.schlossthun.ch). It was built by the dukes of Zähringen at the end of the 12th century. Later it was the home of the counts of Kyburg, as well as the Bernese bailiffs. The massive residential tower has a large Knights' Hall, which contains a Gobelin tapestry from the time of Charles the Bold and a fine collection of halberds and other weapons. Other rooms have important archaeological finds, an exhibit of military uniforms, period furniture, and toys. From the turrets, there's a panoramic view of the surrounding area. The museum is open daily April to October from 10am to 5pm and November to March from 1 to 4pm. Admission is 8F for adults, 2F for children.

Lake Tours -- A fleet of ships with a total capacity of 6,720 passengers operates on Lake Thun daily from April to October. A 4-hour voyage from Interlaken West to Beatenbucht, Spiez, Overhofen, Thun, and back costs 109F in first class, 66F in second class.

Boat trips on Lake Brienz are also available daily from June to September. There are five motor ships and one steamship, with a total capacity of 3,160 passengers. A 3-hour voyage from Interlaken East to Iseltwald, Giessbach, Brienz, and back costs 78F in first class and 46F in second class. For details, call B.L.S. (tel. 058/327-48-11; www.bls.ch).

Meiringen

This resort lies about 13km (8 miles) from Brienz and can be easily visited on a day trip from Interlaken. Several trains headed to Meiringen stop at Interlaken's two railway stations every day. Travel time each way is about 50 minutes.

Strategically centered between three alpine passes (the Grimsel, the Brunig, and the Susten), this old town is a suitable base from which you can explore the eastern sections of the Bernese Oberland and the wild upper reaches of the Aare River. Classified as the major town in the Haslital district and set above the waters of Lake Brienz, Meiringen is famous throughout Europe for its meringue, a dessert that was supposedly invented here.

Rich in scenery and wildlife, the district attracts mountaineers, rock climbers, and hikers. Surrounding the town, you'll find around 300km (186 miles) of marked hiking trails through unspoiled natural settings, with a complicated network of lifts to reach panoramic vantage points. Destinations for excursions include the Aare Gorge, the Rosenlaui Glacier, and the Reichenbach Falls. The district also has a folklore museum, a crystal grotto, an antique water mill, and a pathway across a glacier. Almost everyone visits the parish church in the upper part of the village. Its crypt was built during the 11th century.

From Meiringen, you can set out for Grindelwald, a distance of some 27km (17 miles) and one of the great walks in the Jungfrau region. Along the way you can absorb the stunning panoramas of the massif, the Eiger, with its massive gray rock walls. Soaring summits and white glaciers form your backdrop as you walk along. If you get tired along the way, there are bus stops where you can board public transportation to take you into Grindelwald. This is also an option should the weather turn bad. Otherwise, depending on your stamina, the walk takes from 6 1/2 to 9 hours.

If you're in the mood for meringue, you can buy one or two at a local bakery. According to legend, the dessert was created when Napoleon visited the town and the local chef in charge of the welcoming banquet had a lot of leftover egg whites. Inspired, he created the puffy mounds and served them in a saucer brimming with sweet mountain cream, much to the general's delight.

Aare Gorge is full of recesses, grottoes, precipices, and arches -- all fashioned by the Aare's waters over centuries. The cleft is 1,400m (4,500 ft.) long and 195m (640 ft.) deep, carved in the Kirchet, a craggy barrier left over from the ice age. In some places the towering rock walls of the gorge are so close together that only a few rays of sunshine can penetrate, just before noon. A unique natural wonder of the Swiss Alps, the gorge can be reached only by car, via the Grimsel-Susten road along the Kirchet. Admission is 9F for adults and 5F for children. The gorge is open May to October daily from 10am to 5pm; in July and August its extended hours are from 8am to 6pm.

If you're a fan of Sherlock Holmes, you'll enjoy an excursion to Reichenbach Falls, where the rivers of the Rosenlaui Valley meet. The impressive beauty of the falls has lured many visitors, beginning with the British in the 19th century. One visitor, Sir Arthur Conan Doyle, creator of Holmes, was so impressed with the place that he used it as the setting for the scene in The Final Problem in which the villain, Professor Moriarty, struggles with the detective and tosses Holmes into the falls. You can see a Sherlock Holmes commemorative plaque near the upper station of the funicular. The falls can be visited from mid-May to mid-September. The funicular takes you to a point at 834m (2,735 ft.) near terraces overlooking the water. Handrails provide safety. Departures are every 10 minutes daily from 9 to 11:45am and 1:15 to 5:45pm. The cost of admission is 10F for adults and 8F for children. The price includes the cost of the funicular. It's a 10-minute walk from Meiringen to the base of the funicular. If you're driving from Meiringen, take the road to Grimsel and turn right toward Reichenbach Falls and Mervenklinik. For more information, call tel. 033/972-90-10.

After admiring the cascade, you can hike through the river valley. The footpath through the Rosenlaui Valley is marked. After 90 minutes you'll arrive at the entrance to Rosenlaui Gorge. The surfaces of the sheer rock faces echo the sounds of the many small waterfalls within. The glacier gorges, which have been hollowed out by the waters from the melting ice of the Rosenlaui Glacier, are a spectacular sight. You can walk from one end of this gorge to the other in about 30 minutes. A small hotel and seasonal restaurant are near the entrance. Most visitors turn around at the uppermost reaches of the gorge and make the 2-hour trek back to Reichenbach Falls to pick up the funicular back to Meiringen. The gorge can be visited May to October daily from 9am to 5pm. The cost is 7F for adults and 3.50F for children.

The Murder of Sherlock Holmes -- In 1891, the English writer Sir Arthur Conan Doyle, creator of the most famous detective in all fiction, Sherlock Holmes, acted too hastily in killing off his fictional hero. In a story entitled The Final Problem, after a battle with Professor Moriarty (called "the Napoleon of Crime"), Holmes and the fiendish villain were sent plunging to their deaths into Reichenbach Falls at Meiringen.

Although the Sherlock Holmes stories had proven successful, Conan Doyle apparently decided that he'd had enough of Sherlock's sleuthing. His rather outraged public disagreed, so Conan Doyle was forced to virtually call back Sherlock Holmes from the dead, and the detective went on to solve at least 60 more crimes.

The wonder of the falls is reason enough to visit the site, but Holmes devotees wanted more, so in May 1991 the town leaders opened a Sherlock Holmes Museum, Bahnhofstrasse 26 (tel. 033/971-41-41), in an old Anglican church at Meiringen. There, you can visit a recreation of Sherlock Holmes's sitting room at 221B Baker St. in London, with exhibits donated by fans from around the world. The museum is open May through September Tuesday to Sunday from 1:30 to 6pm, and October to April Wednesday and Sunday 4:30 to 6pm. Admission costs 4F for adults and 3F for children.

Note: This information was accurate when it was published, but can change without notice. Please be sure to confirm all rates and details directly with the companies in question before planning your trip.