You'd never know the houses at 23-24 Leinster Gardens were fakes—until you see the train tracks on the other side.

Never actually a tree at all, this spot was the site of London's public hangings for nearly 600 years.

Ship-sized kinetic sculptural fantasy.

Colorful murals by Jean Cocteau hide within this peaceful London sanctuary.

On October 17, 1814, a 15-ft. wave of beer ran rampant through the streets of London.

This London marker celebrates the spot where the world-famous English band was founded.

19th-century scientists would make the pilgrimage here to verify the precision of their measuring sticks.

Thanks to modern navigational tools we now know that the true prime meridian runs through a park next door.

The handiwork of a underdog clockmaker who solved an impossible problem for an Empire, and forever revolutionized seafaring.

This iconic high-rise residential block was one of the last to be built in the Brutalist style.

Legend says these colorful, invasive residents are the descendants of birds released by Jimi Hendrix.

This unique bridge curls up like a caterpillar to let boats pass and then unfurls again to span a small canal.

One of the largest sculpture collections in the U.K. features history's greats, from Bob Dylan to Galileo, in bronze.

This centuries-old pub boasts a collection of more than 4,500 snippets of neckties from around the world.

World's largest bell sits on the grounds of the Kremlin in Moscow.

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

The tallest hotel in Europe.

An architectural oddity hides in plain sight on this iconic London bridge.

This macabre masterpiece of a mural is one of Francisco Goya's "Black Paintings."

Commonly acknowledged as the only public monument to the Devil himself.

This sweet-toothed bear searching for snacks has been a symbol of Madrid for decades.

An ancient Egyptian temple in the middle of Madrid, Spain.

The Cathedral of Salamanca has a number of unusual carvings but none so surprising as a modern astronaut.

Thanks to an acoustic anomaly, this unassuming stone bench has heard one hundred years of secrets.