Once defending the city of New Orleans from invasion by sea, this fort faces an uncertain future.

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.

An elaborate shrine dedicated to the four corners of the world unfortunately misses its mark.

These Nubian pyramids are strange and unique, even by pyramid standards.

A bronze monument to the infamous radio broadcast in the real New Jersey town where the fictional Martians crash-landed.

The United States Capitol's former columns still stand.

The sci-fi villain is a little-known inhabitant of the U.S. capital's largest cathedral.

Remnants of a storybook amusement park hidden behind a strip mall.

Statue dedicated to the star of an old television show.

This shop for all your super spy needs hides an educational secret.

Niagara Falls holds a special place in Nikola Tesla's history, so they put a statue on it.

There are more than 4 million bricks inside this unofficial Lego museum in a former middle school.

Trade in that pesky human soul for cold-hard circuits.

Abandoned concert venue legendary for its rock counterculture.

A former French military respite turned jungle tourism hotspot.

Less a museum than a bizarre fantasy world created by artists and engineers.

This museum gives tribute to the underappreciated "Down-South Submarine."

A recreated Stonehenge stands in a country field, complete with Easter Island moai heads standing as sentries.

A museum dedicated to man's boldest venture.

Prehistoric animals decorate this popular outdoor park.

In this case, 'zero' marks the spot where the iconic Old Spanish Trail ends.

Gutted airplanes slowly decay in a Florida field.

Ruins of a Carnegie family mansion on Cumberland Island.