A 16th-century horror show built in a lovely Italian garden.

The home and studio of a visionary woodworker now stands as a museum and example of his artistic genius.

This whimsical stacked cabin looks like something out of a children's book.

This unreal Portuguese palace looks as though it's made from a pile of different castles.

Wondrous sandstone hoodoos where Native Americans collected clay for pottery, 9,000 years ago.

A fiery crater has been burning in the Karakum Desert since 1971.

This trio of Dominican cave lakes comprise a colorful biosphere of natural life.

These Great Lakes sea caves accessible by boat in the summer turn into temples of ice reachable by foot in the winter.

This 4,000-foot-diameter hole is touted as "the most well known, best preserved meteorite crater on Earth."

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

A massive underwater sinkhole made famous by Jacques Cousteau.

Every autumn, this hillside is ablaze with red summer cypress.

Oregon's unexpected high desert, displaying layers of time in a colorful show.

The most alien-looking place on Earth.