This ancient Greek place of assembly and marketplace is being revealed layer by layer below the modern Athens cityscape.

This Colorado fire station has been in continuous operation for more than a century.

The largest earthwork effigy in the world.

A haunted hill that supposedly defied gravity.

This historic lighthouse was well known for the large number of women who served as its keeper.

A gregarious Ohio resident has been building his whimsical temple to peace for decades.

A castle built by an eccentric medieval enthusiast in rural Ohio.

The final resting place of Christopher Columbus - or possibly someone else.

A museum of unusual collections, mini-towns, and a half-dog, half-alligator.

A monument to a Native American leader who was known for never breaking a promise and met his end after signing a deal with white settlers.

The final resting place of the most famous sharpshooter.

An abandoned Victorian-era amusement park is rusting away amidst luxury houses.

Enormous small-business mecca in the Midwest, serving dozens of artists.