Many visitors, both foreign and domestic, clog the roads to Cascais on summer Sundays, when bullfights are held at the Monumental de Cascais, a ring outside the "city" center.
When you're not at the beach, a good place to relax is the sprawling Parque do Marechal Carmona, open daily from 8:30am to 7:45pm in the summer and until 5:45pm in the winter. It lies at the southern tip of the resort, near the water. Here you'll find a shallow lake, a cafe, and a small zoo. Chairs and tables are set out under shade trees if you'd like to picnic.
The most important church is the Igreja de Nossa Senhora da Assunção (Church of Our Lady of the Assumption), on Largo da Assunção (tel. 21/484-74-80), a leafy square toward the western edge of town. It's open daily from 9am to 1pm and 5 to 8pm. Paintings by Josefa de Óbidos, a 17th-century artist, fill the nave. They're unusual because women rarely attained such artistic posts in those days. The hand-painted azulejos (tiles) date from 1720 and 1748. The beautiful altar dates from the end of the 16th century.
Cascais also has some minor museums, including the Museu do Mar (Museum of the Sea), Rua Julio Pereira de Mello (tel. 21/486-13-77 or 21/482-54-00). The museum displays fishing artifacts, including equipment and model boats. Folkloric apparel worn by residents in the 1800s is also on exhibit. Old photographs and paintings re-create the Cascais of long ago. The museum is open November to April Tuesday to Sunday 10am to 5pm, and May to October 10am to 9pm; admission is 2€.
Another museum is the Museu do Conde de Castro Guimarães, Avenida Rei Humberto II de Itália, Estrada da Boca do Inferno (tel. 21/482-54-07). On the grounds of the Parque do Marechal Carmona, it occupies the former 19th-century home of a family whose last surviving member died in 1927. The museum offers a rare glimpse into life in the 18th and 19th centuries, with ceramics, antiques, artwork, silver ewers, samovars, and Indo-Portuguese embroidered shawls -- you name it. It's open Tuesday to Sunday 10am to 12:30pm and 2 to 5pm; admission is 2€ and free for children under 18 and seniors. Guided tours are on the hour between 10am and 5pm.
The most popular excursion outside Cascais is to Boca do Inferno (Mouth of Hell). Thundering waves sweep in with such power that they've carved a wide hole resembling a mouth, or boca, into the cliffs. However, if you should arrive when the sea is calm, you'll wonder why it's called a cauldron. The Mouth of Hell can be a windswept roar if you don't stumble over too many souvenir hawkers. Take the highway toward Guincho and then turn left toward the sea.
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.