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.

San Francisco's oldest surviving monument and meeting place for 1906 survivors.

The second building of its name to occupy this location might be the finest flatiron building in San Francisco.

Tiki luxury on Nob Hill.

Abstract marble carving for an 8.5-pound rock.

Auburn's iconic eagle flight goes back to a 19th century eagle that dropped dead on the field after inspiring the football team to victory.

Believed to be the oldest active college baseball field in America.

A local dive where religious kitsch, Southern identity, and queer culture collide.

The picturesque southern city served as the zombie-filled town of Woodbury in 'The Walking Dead.'

This ever-changing arrangement of naked dolls even caught the attention of "The Walking Dead" crew.