The world's largest mountain carving could fit all of Mount Rushmore inside it many times over.

Over 100 concrete munitions bunkers are all that remain of a Pennsylvanian village seized by the US government.

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

This rare vessel mixed luxury with labor before being converted to a museum and sometimes haunted maze.

This picturesque cliffside beacon no longer calls to sailors but shines once a year in honor of a famous shipwreck.

When ecosystems collide in the arid Southwest.

Paranormal experiences in this hotel's room 217 led Stephen King to write "The Shining."

The Denver airport is guarded by a 32-foot-tall sculpture of a demonic horse.

A downtown park built on top of unclaimed graves.

A large circus museum with summer performances.

Giant six-pack could provide one person a six-pack a day for 3,351 years.