The sea is cool and relatively calm, and visibility is clear on a Saturday in March. The coral reef in this 5.3-square-mile sanctuary is vibrant with life, thanks to twenty years of protection from spearfishing, coral collecting, and lobstering. A diverse marine society -- sea turtles, sharks, barracuda, tropical fish, crustaceans, and eels, just to name a few -- roams this surreal city of colorful coral architecture. There are rock ledges up to 35 feet tall, large sea fans swaying slowly with the tide, and staghorn coral that resemble fantastic castles -- all visions from a dream. Bahia Honda State Park offers trips twice daily on a glass-bottom boat. For $24.95 you can snorkel for about an hour and a half. Gear costs extra.