Once home to seven different roller coasters, Glen Echo has undergone many transformations since its founding in 1891.

A museum dedicated to exhibiting remarkable outsider art.

Singing sand that stands as the final remains of an ancient lake.

This "Plant Farm Museum" is home to the divinely inspired and visionary outsider artwork of Reverend Howard Finster.

A mysterious monument meant to be a guide into "an Age of Reason" was destroyed after an apparent bombing.

A white oak with property rights.

An abandoned bait shop with a front lot filled with storage boxes.

Healing Springs that once ran red with soldiers' blood.

Giant instrument-shaped home in Fayetteville, Georgia.

A vision of beautiful Hindu architecture in the middle of the American South.

A humid oasis combines recreation with exploration in a unique underwater cavern.

A 1950s eccentric's vision of Eden preserved as a hiking trail.

World's largest magnetic research facility.

World's largest precision optical instrument used to detect Einstein's elusive gravity waves.

A Rodeo for Prisoners.

Oldest and rarest examples of telecommunication in the world.

A snapshot of the city's fascinating voodoo culture.

This symbolic piece of New Orleans architecture is also home to a few ghastly stories.

The second oldest continuously operating bar in Louisiana.

A 19th-century shrine covered with prosthetic body parts as votive offerings.

Site of a former hidden treehouse in New Orleans.

The crumbling remains of a 19th century fortess.

A theme park that suffered massive flooding during Katrina was abandoned, and now proves irresistible to trespassing explorers.

A real (but thankfully not live) missile stands tall as a monument to the United States military in the small town of Cordele.