The walls and streets of the ancient city are peppered with penises.

A magical oasis in the middle of the Negev Desert.

This tiny islet has somehow housed an ancient temple, two monasteries, a church, a fortress, and a restaurant.

Buried next to Pompeii, this lesser-known Roman villa was the opulent vacation home of Emperor Nero's wife.

This exceptionally well-preserved ancient marvel also houses a small museum dedicated to Jordanian folk tradition.

Stare out over the lagoon and beyond from this 10th-century campanile on the island where the city of Venice began.

Dublin's most modern, visually spectacular bridge is modeled after Ireland's national emblem.

The first memorial dedicated solely to the Black troops who fought for the Union.

Hollywood's oldest hotel is the site of the first Academy Awards, the birthplace of Marilyn Monroe's career, and the home of Montgomery Clift's ghost.

This unassuming tree stump reportedly traces its roots to the famous pharaoh queen's reign.

Just outside of Jordan's capital lies an ancient castle and intriguing caves dating back to the Copper Age.

An incredible airplane graveyard sits outside this small museum dedicated to preserving aviation history.

This surprising gem is a world-class archeological museum hidden at the University of Chicago.

Historic fortifications form the boundary of Vatican City, but it’s not entirely surrounded by walls.

This crumbling medieval basilica once attracted pilgrims by the thousands to collect a miraculous dust that formed above the saint's tomb.

This Roman amphitheatre was also the location of the first gladiator school.

Turkish adventurer antiques in the heart of the Grand Bazaar.

The world's longest known cave system.

This replica of the Greek structure is in the heart of Nashville.

This two-room shotgun shack in Tupelo is the birthplace of a King.

An endless sea of white conical domes.

This ancient structure is widely thought to be the oldest intact pyramid in the world.

It might not be the prettiest pyramid in Egypt, but it may be the muddiest.

Ancient Egyptian relief, claimed to depict an electrical light.