Extreme-Exercises.com speculates on a list of the 10 Best Hiking Trails In The World each with a video.
Click PLAY or check out Angels Landing on YouTube.
10. Alum Cave Trail To Mount LeConte
Location- Sevier County, Tennessee in Great Smoky Mountains National Park9. Hike Up Mount Pinatubo To Crater Lake
Location- Phillipines8. Breakneck Ridge Trail
Location- New York7. Bright Angel Trail
Location- Grand Canyon, Arizona6. Yosemite Half Dome
Location- California5. Inca Trail to Machu Picchu
Location- Peru4. Haiku’s Ladder
Location- Oahu, Hawaii3. Angels Landing
Location- Utah2. El Camino del Rey
Location- Spain1. Huashan Hiking Trail
Location- China
See VIDEOS and LINKS on Extreme-Exercises.com
besthike.com 
Interesting description of Caves to Hike http://cavehikingtrips.blogspot.com/
Thanks.
I’m not much of a spelunker. But that site is interestingly … dark.