Housed in a century-old building, this museum's dedicated not just to soft drinks, but to the free enterprise system.

An otherworldly musical haven in The Big Easy.

A derelict bit of transportation infrastructure hidden in the woods.

A museum dedicated to exhibiting remarkable outsider art.

A hidden gem on the lawn of the U.S. Capitol Building designed by landscape architect Frederick Law Olmsted.

A three-story tower of books about Abraham Lincoln is one of the more unusual monuments to the president.

Fourteen curious and controversial white bunnies sit in a circle near Newport Beach City Hall.

This ancient octopus-like tree was saved from destruction thanks to shady reporting.

A park full of outsider art, created by college students studying outsider art.

A railroad tunnel that, upon its completion, was considered one of the engineering marvels of the modern world.

A sprawling Baroque park with 300-year-old hydro-pneumatic waterworks.

The gloomy ruins that inspired Bram Stoker to bring Dracula to life.

Giant origami sculptures tucked into desert scenery beckon passers-by to explore further.

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

An eerie, decaying ghost town destined to fade into the forest.

The entrance to this sinisterly named tunnel hides behind a Tim Hortons.

A hidden beach at the end of a tunnel of mangrove trees.

A monument in Washington D.C. marks the spot from which all other roads were supposed to stem.

Prison made famous by The Shawshank Redemption has been out of commission since 1990.

A lovely aquatic park built by a one-armed Civil War veteran who made a fortune from lotuses.

A cavernous three-story, 43,800-square-foot basement that was forgotten about for 60 years.

A painfully obvious spy house sits right across the street from the Russian Embassy.

They call this long foot bridge a swinging bridge, but really it's the bouncing you have to watch out for.

One of the oldest living oak trees in the Southeast.