7 lost underwater worlds

Watch as cave divers explore the eerie depths of Mexico's El Toh

Take a tour of America's vanishing rest stops

Icelandic tourism has gone through the roof (and that's not necessarily a good thing)

Would you buy a murder home?

11 American geographic anomalies

You know you want to take a dip in these crystal-clear waters

Extreme camping has never looked so beautiful

Insect threatens to turn the Taj Mahal green

10 mountain hikes for city-dwellers

Thailand shutters access to island paradise over tourism threats to environment

The pleasures (and pains) of Patagonia