What makes these places worth visiting is not the spring itself but what a community does when free heat is available indefinitely. The answers are remarkably consistent. Here are ten.…
A cave developed for visitors is called a show cave, and the good ones manage to be accessible without being diminished. These twelve have walkways, guides and lighting, and are…
Canyons are slow arguments between rock and water, and the winner is always the water given enough time. What varies is the rock, the climate and how long the argument…
Source: Wikipedia
The Naica mine in the Mexican state of Chihuahua has been producing lead, zinc, and silver for well over a century. It is a working industrial site, and the…
There is nothing quite like looking into a crater and understanding, in a physical way, that the ground you live on is a thin crust over something enormous. These fourteen…
Source: Wikipedia
Look at a map of the Mediterranean Sea today, and you see a vast, deep body of water, ringed by the coastlines of Europe, Africa, and the Middle East,…