What is left of the pillar of Saint Simeon, the voluntary martyr who climbed the column to give his sermons, remaining perched there for thirty-seven years.

Mysterious lost empire of the Silk Road.

Ruins of the Crusaders' headquarters.

The tower was originally used as a chimney for the waste incinerator of St. John's Precinct and Market.

Gutted during the Liverpool Blitz, this architectural husk has been left destroyed in honor of the dead.

Mysteriously stacked storefront paths give this medieval British town an iconic style like none other.

One of the few standing Roman lighthouses and a labyrinth of tunnels are a couple of the secrets at this historic castle.

Hundreds of prehistoric stones, arranged in perfect lines in a French field.

This 1,300 year old monastery built atop a single rock was once only accessible depending on the whims of the tide.

It houses the remains of a 17th-century version of the Titanic.

Mysterious craters may have been home to an ancient cult.

The Guardian of Tallinn.

The biggest museum dedicated to insects in North America, one of the largest in the world.

Montreal's giant farmer's market is a foodie's best friend, especially in the winter months.

City law dictates that this mountaintop cathedral containing the heart of a saint is to remain the tallest building in town.

This memorial to a horrific ship collision sits over a mass grave holding dozens of the victims.

Village situated on a narrow volcanic escarpment.

Gaze upon chocolate sculptures depicting everything from chariot races to Gaudí's famous church at this shrine to sweets.

A former steam-powered mill from the 1800s is now an industrial park with a giant steel dragon slide.

One of Antoni Gaudí's most classic buildings is well-known for its "dragon-back" design.

Construction of Barcelona's iconic (but controversial) church is expected to be completed in 2026—a century after the death of its architect.

Mountain where Jesus was first tempted by the Devil.

What once sat in the world’s spotlight is today a largely disused ghost complex.

A minotaur, a labyrinth, and a dubious restoration pull in visitors from around the world.