The Viñales Valley is a great spot to bicycle around, and there are good options for bird-watching, hiking, rock climbing, spelunking or just relaxing on beautiful beaches.
Caves abound in this area and are one of the major attractions in and around Viñales.
La Cueva del Indio (The Indian's Cave) is the most popular cave and it's become a real tourist trap. Located about 5km (3 miles) north of Viņales at Km 33 on the Carretera de Puerto Esperanza, this cave gets its name from the fact that indigenous remains were found here. Only 1km (1/2 mile) or so of the extensive cave system here is open to travelers. A well-lit path leads from the entrance through a few small and narrow galleries to a tiny dock on an underground river. Here you board a small rowboat powered by an outboard engine for a quick trip of about 180m (600 ft.) up and down this river before exiting the cave at a dock area crowded with souvenir stands and a little snack bar.
Those with an interest in more serious spelunking should head to Las Cuevas de Santo Tomás. With over 45km (28 miles) of connected tunnels, chambers, and galleries, it's the largest explored cave system in Cuba. Some of these chambers and galleries are quite massive, with impressive stalagmite and stalactite formations. Unlike La Cueva del Indio, this cave system has been left in its natural state and you must visit it with headlamps and flashlights. So far, a relatively simple 1km (1/2 mile) section has been opened for guided tours, although more adventurous spelunking tours are in the works.
Feel free to take a pass on the Mural de la Prehistoria (Prehistoric Mural). This is to be viewed only if you are in the vicinity and happen to be passing nearby. It is over-hyped and decidedly uninteresting. Despite some fresh paint, which restored -- and even improved on -- the vibrant colors of artist Leovigildo González Morillo's original work, this massive mural lacks the style and weight of the works of his mentor, Diego Rivera. The mural is located 4km (2 1/2 miles) west of Viñales and is open daily from 8am to 5pm.