With a focus on conservation and education, Dolphin Cay offers interactions with 20 bottlenose dolphins in their own habitat. Guests can also observe more than 50,000 marine mammals at the Altantis' Marine Habitat, which includes underground tunnels surrounded by sharks, open-air lagoons, and passageways with stingrays and piranhas.

Balinese-inspired treatments are available in the two-story Mandara Spa's 35 treatment rooms. An outdoor marketplace, Marina Village, showcases local culture throughout its 20 shops. Additional recreational facilities include 11 lagoons; 13 swimming areas; the Dig, an underground maze of corridors and viewing tanks containing sea creatures; the Mayan Temple's five waterslides; Turtle Beach, a sanctuary for native turtles; an 8,000-square-foot casino; a two-story nightclub; Sports Center, complete with tennis courts; and plenty of watersports. The property's 20 restaurants and bars range from casual fare to gourmet dining with celebrity chefs Bobby Flay, Jean Georges Vongerichten, and Nobu Matsuhisa.

Harborside has one-, two-, and three-bedroom villas with kitchens or kitchenettes, jetted tubs, and entertainment centers with TVs and DVD/CD players or VCRs.