Bordering the St. Johns River, opposite Jacksonville Landing this 1 1/4-mile wooden zigzag boardwalk is usually filled with joggers, tourists, folks sitting on benches, and lovers walking hand-in-hand, all of them watching the riverboats, the shorebirds, and downtown's skyline reflected in the water. At 200 feet in diameter, the Friendship Fountain, near the west end, is the nation's largest self-contained fountain; it's especially beautiful at night when illuminated by 265 colored lights. Nearby, you'll pass military memorials, a small museum dedicated to the city's history, and the Museum of Science & History of Jacksonville (MOSH), at Museum Circle and San Marco Boulevard (tel. 904/396-6674; MOSH is an interactive children's museum focusing on the science and history of Northeast Florida. One of its stars is an Allosaurus dinosaur skeleton. It also has a small planetarium, with shows included in museum admission: $10 for adults, $8.50 for seniors, and $8 for children ages 3 to 12. The museum is open Monday through Friday from 10am to 5pm, Saturday from 10am to 6pm, and Sunday from 1 to 6pm. The Riverwalk is the scene of special MOSH programs, seafood fests, parties, parades, and arts-and-crafts festivals.