In 1979 three atolls disappeared after a seaquake off Las Terrenas, providing an opportunity for truly memorable dives. Also just offshore from Las Terrenas are the Islas Las Ballenas (the Whale Islands), a cluster of four little islands with good snorkeling. A coral reef is off Playa Jackson, a beach accessible only by boat.
Las Galeras Divers. This is a professional, safety-conscious operation. Owner Serge is a PADI, OWSI, and nitrox instructor, and every level of PADI course is offered. Diving lessons and trips are offered in English, French, and Spanish, and diving equipment rentals are also available. Discounts are given to groups, families, and divers who want a package deal. Calle Principal, Las Galeras, Samaná, 32000. 809/538–0220; 809/715-4111; www.las-galeras-divers.com. From $45.