A giant Troll lurks under one of Seattle's oldest bridges.

An underground magnet for ever-changing street art.

This stone is a marker of one millionaire's personal vendetta against gravity.

The remains of one of America's first radiation testing grounds still rest ominously in a Georgia forest.

The world's first time capsule lies behind a welded steel door in Atlanta.

This intricate Hindu temple is the largest of its kind outside of India itself and was constructed like a giant puzzle.

A man's home is his castle.

A house carved into a rock in the 1940s.

The longest living non-clonal organisms on Earth.

This crumbling stump is all that remains of what was once thought to be the oldest living organism.

Dig for your own trilobites in this goldmine of invertebrates.

An earthwork sculpture built by Robert Smithson in the Great Salt Lake only reemerges during drought.

This geothermal hot spring hides beneath a slowly growing mineral dome.

A replica that won't float away.

"May the force be with you always."

Pyramid home to an obscure religious group that practices modern mummification.