A statue in Budapest's Liberty Square honors the former U.S. president's efforts to end the Cold War.

Uh, pardon me, ma'am, but I couldn't help noticing that there's a Columbo statue in the middle of Budapest.

Banksy gives themself artistic license with this piece of London street art.

An alleyway plaque is all that remains of the independent Texas' envoy that forgot to pay their rent for over a century.

The last four extravagant street signs of London's historic banking street.

Rebuilt remains of a temple to Roman god Mithras.

Hear the quietest sound from across the dome.

A plaque marks the underground site of one of London's "lost rivers."

An unusual round church in London with a Templar past.

The "beautiful" equation predicting the movement of all electromagnetic particles is engraved in front of Newton's tomb.

A naturally mummified 2,000-year-old man.

The perfectly preserved underground rooms where Churchill plotted the war against Germany.

The mysterious large white cross visible from the runway is a memorial to a massacre during Spanish Civil War.

Part of the medieval watchtower is displayed in an otherwise ordinary parking garage.

Of course Salvador Dalí lived in a castle...

Giant eggs, walls of bread, and nightmare surreality mark the largest collection of works by Salvador Dalí.

Gaudí's famously flamboyant architectural style is on full display in this sprawling park and garden.

A vista of the city and sea from atop the little-known viewing deck on an unassuming Columbus statue.

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

This former Baroque palace on the historic Calle Montcada is a rare architectural gem and was once the meeting place of an aristocratic scholarly society.

Possibly the oldest church in Barcelona, this basilica has its pagan and Christian mythologies all mixed up.

The iconic boulevard is the perfect place to catch sight of a bicycling skeleton, a levitating Satan, or a chef with his head stuck in a pizza.

The oldest giants in Catalonia are now displayed in a 14th-century Gothic church.

This former charity hospital for elderly clergy houses some of Seville’s most treasured paintings.