Black Rock/Piedra Pretu
If you suffer from seasickness, you have two choices on this dive— don't go, or take non-drowsy, seasickness medication to ease the trip.
Black Rock, also called Piedra Pretu, makes a spectacular wall dive. The site has a lush shallow terrace and a steep, deep wall, which drops to about 37 m (120 ft) and then slopes off further to depths well beyond safe recreational dive standards.
Snorkeling at your own risk.