• Introduction
• 1. Drag Racing
• 2. Gorilla Safari
• 3. Heli-Skiing
• 4. Mountain Climbing
• 5. Sandboarding
• 6. Shark Diving
• 7. Space Travel
• 8. Spelunking
• 9. Stunt Vacations
• 10. Titanic Dive

Spelunking

Rappel down the side of a limestone cliff, squeeze through damp crevices covered with luminescent glow worms, leap from a subterranean waterfall, and go "black-water rafting" in the underground rapids at Ruakuri Cave, part of the otherworldly Waitomo cave system in New Zealand. The five-hour Black Abyss adventure offered by The Legendary Black Water Rafting Co. is the most challenging of the region's guided tours, with a mix of climbing, rappelling, and cave tubing.

Low-Adrenaline Alternative: For a less-demanding domestic descent, go to Carlsbad Caverns National Park in southern New Mexico. Rather than rivers and waterfalls, the 300 caves here were carved out by limestone-dissolving sulfuric acid, making for a much drier – yet still "deeply" satisfying – experience.

See Argentina Travel Guide | See Costa Rica Travel Guide | See Ecuador Travel Guide | See Egypt Travel Guide | See India Travel Guide | See U.S. Virgin Islands Travel Guide | See San Diego Travel Guide | See New Mexico Travel Guide | See The Big Island Travel Guide