Visit locales that stand out as the most extreme—and test their inhabitants to the limit.

See wonders created by the grand and unpredictable power of water—and the challenges for residents.

Witness wonders created by the force that makes our planet unique—life itself.

In some natural wonders, people must push themselves to the absolute limit in order to survive. For the people who call these extraordinary places home, survival requires great skill, determination, and courage.

In many of the world’s most extraordinary natural wonders, wildlife holds the key to survival for the people who live there. But even there, animals can be foes, as well as friends.

Earth’s natural wonders are among the most extreme places to live on the planet. From soaring mountains to deep jungles, and frozen polar worlds, human beings need bravery and ingenuity to survive within them.