Hawaii Scuba Diving, Scuba Diving Training with Island Divers Hawaii - Honolulu, Waikiki. Sea Elite Dive Knife Sk41 Point @ Divers-Supply.com. Extreme Travel: The New Vacation – M-Theory. Most travelers are content with all-inclusive resorts, the sun and the sea, but a new breed of vacationer is seeking an experience that is unique and extreme. These vacations are exciting and offer more adrenaline than any resort ever could. The popularity of Adventure Travel has grown in recent years due to many factors including the need to combine sports, risk and adventure, the once-in-a-lifetime-experience of traveling to an almost unreachable destination, and a generation of people who want to experience things they often only get to see in movies. CAVE DIVING, Mexico Cave Diving The Yucatan Peninsula in Mexico offers a beautiful labyrinth of caves and cenotes that pockmark the world’s longest underground river.