Most-visited and most-photographed slot canyon in the American Southwest.

A collision of human error and natural geothermal pressure created this rainbow-colored geologic wonder.

A bizarre house filled with an astounding array of collections.

An exquisite tunnel of cascading flowers.

An Italian crevasse filled with abandoned buildings gives visitors a look at the world without humans.

A toxic ghost town sitting atop a massive coal fire.

A theme park that suffered massive flooding during Katrina was abandoned, and now proves irresistible to trespassing explorers.

Rippling sand dunes frozen in the Arizona rock.

The intricate stonework of Machu Picchu serves as a testament to Incan engineers.