The crumbling remains of a 19th century fortess.

This strange, small castle on the bayou has withstood the test of time and weather.

A collection of huge Pre-Colombian structures in Alabama.

Electrical pylon in the shape of Disney's beloved mouse.

The so-called "world's shortest river" is actually a window into a cave.

This relatively recently abandoned brewery is a tragic reminder of the continuing effects of Hurricane Katrina.

This cathedral dedicated to Louis IX, sainted King of France, holds many secrets.

This New Orleans statue of a portly figure in a goofy hat pays homage to a classic of satirical literature.

A historic Civil War estate-turned-museum looks back on the Confederate States of America.

Two New York rooftops are home to the largest rooftop soil farms in the world.

An old saloon in the West filled with history, and according to some, a few dozen ghosts.

One woman's Viking Castle on Lake Tahoe.

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

One of the most well-preserved castles in Italy also contains a rare medieval example of a port fortification.

An extensive collection of reliquaries containing the bones of saints housed in the largest Catholic church in Venice.

This Roman statue is missing a limb from when the Venetians stole it from Constantinople during the Crusades.

Go inside to really appreciate this 500-year-old technological masterpiece.

An Alabama courtroom where two famous American authors played as children became the setting for a Pulitzer Prize-winning novel.

Every equinox this Maya pyramid puts on a spooky ancient light show.

Clap your hands at the base of the pyramid, and the song of a sacred Mayan bird will echo through the air.

No telescopes, no power, no gift shop: The Observatory of Chichen Itza, one of the world's oldest observatories, takes astronomy back to basics.

Created in 1972, the famous sculptor's intricately detailed monument to San Francisco is overflowing with city landmarks.

Only hotel where you can legally launder money.

Nestled in the heart of San Francisco’s bustling Financial District stands a unique homage to the Mayan and Beaux Arts.