While the Caribbean coast has yet to develop a serious scuba diving infrastructure, diving off the Pacific Coast is nothing short of spectacular. The underwater volcanic rock formations and pinnacles are home to small hard corals, sponges and gorgonians. Guanacaste is a giant bay off the northwest coast that provides access to Catalina and Bat Islands – key dive areas. The southern area is a protected biological reserve and offers the chance to see rays, turtles, and white-tip reef sharks. Plus, you’ll see large schools of fish swimming overhead on almost every dive. You can also get out to Cocos Island off the Pacific coast to dive with its hammerhead shark schools, whale sharks and manta rays.