Diving is a popular activity for those visiting Ilhabela. In the calm, transparent waters, you can explore the marine wildlife as well as discover the mysteries surrounding the island’s various shipwrecks. It is said that Ilhabela has more than 100 close to its shore. These vessels have formed huge submerged artificial reefs, and are now home to a wide variety of aquatic species such as turtles, octopuses, and the like. It is still possible to actually see the ships. Beginning divers should aim for the most popular wrecks, such as the Aymoré (1914; Curral Beach; 3–7 meters) and the Darth (1894; Itaboca Beach; 5–15 meters). There are numerous diving schools along nearly every beach, which also rent equipment if you are happy to go solo.

Colonial Diver. You can rent equipment, take diving classes, and arrange for a dive-boat trip through Colonial Diver. The basic course takes up to three days and costs around R$1,190, which includes equipment for the classes, course material, and an international certificate. Av. Brasil 1751, Ilhabela, 11630–000. 012/3894–9459;www.colonialdiver.com.br.

Ilha das Cabras. The main attractions of this little piece of paradise—besides the white sand and clear water—are the tiny bars that serve delicious, fresh seafood and the Ecological Sanctuary of Ilha das Cabras. The park, created in 1992, is a secluded reserve around the island and is also a great diving and fish-watching site. While most "baptisms" of diving beginners take place here, seasoned divers head off to their underwater adventures at the diving/snorkeling sanctuary off the shore of the isle, where a statue of Neptune can be found at the 22-foot depth. 2 km (1 mile) south of ferry, Ilhabela, 11630–000.

Ilha de Búzios. A nearly two-hour boat trip separates Ilhabela from Ilha de Búzios, but the effort is totally worthwhile. Because it is located far from the coast, the water is very transparent, meaning divers will be able to see plenty of colorful fish and other underwater fauna such as rays and sea turtles.

The main stars, however, are the dolphins, which fearlessly approach boats. 25 km (15 miles) offshore; take boat from São Sebastião,Ilhabela, 11630–000.

Itaboca. 

One of best places for diving is Itaboca, where British ship Darth sank in 1884, leaving bottles of wine and porcelain dishes that can still be found. 17 km (11 miles) south of ferry dock, Ilhabela, 11630–000.