The birthplace of Karl Marx is now a museum dedicated to the communist revolutionary's life and work.

This statue once earned the distinction as one of the "Three Major Disappointments of the World."

This building holds the embalmed remains of the leader of the Bolshevik Revolution.

World's oldest and largest space launch facility, once a secret missile testing site.

Holy Hindu shrine in an enormous, monkey-filled limestone cavern.

Though it was originally dedicated to the Hindu god Shiva, Baphuon was converted to a Buddhist temple in the 15th century, complete with a massive hidden statue.

A former major munitions plant that has been converted into a sprawling art space.

A Romanesque tower appears when water levels drop.

Construction of Barcelona’s iconic (but controversial) church was finally completed in 2026—a century after the death of its architect.

This striking observation tower shaped like a spinnaker sail is the newest icon in historic Portsmouth.

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

Ha Long Bay's "Cave of Surprises" houses a popular phallic rock formation.

An abandoned colonial French prison notorious for its hellish conditions.

There is a strange little carving of a person seemingly crushed by a pillar behind the remains of St. Thomas Aquinas.

Derelict airplane bodies serve as both home and income for three Thai families.