The last remnants of a massive medieval wall that once encompassed the city of Berlin.

The bunker where Hitler took his own life is hidden under this deliberately ordinary parking lot.

On the Spree bank, discover one of the last reminders of a symbolic wall that divided, and was torn down by the people.

Thousands of coffin-like pillars make up this controversial Holocaust memorial.

Go surfing on this urban wave, "hacked" by local surfers.

Daily jousts and dancing barrel makers in Munich's mechanical clock.

Not merely a museum – but a whirring powerhouse that offers a subterranean peek into the heart and soul of cable car operations.

A collection of 20th-century automata, penny arcade games, and musical contraptions.

In all of the 29 years it was in operation, no prisoners ever escaped successfully... or so they claim.

The unusual burial monument of Arizona's first governor.

A striking 500-year-old mansion provides an unexpectedly sublime home for live deer and a menagerie of exotic stuffed animals.

This unchanged Victorian park is rumored to have been the inspiration behind Peter Pan's Neverland.

Hidden behind an industrial area, this is one of the very few such transporter bridges in existence.

This very ornate Victorian gateway seems completely out of place in the modern industrial city of Warrington.

In Warrington’s Golden Square, it's always tea time.

This bronze statue was erected to honor a small Scottish town's beloved stray cat.

Every St. Andrews student knows to avoid this inscription for fear of a martyr's curse.

The initials "GW" mark where one of Scotland's most important Protestant martyrs was burned at the stake.

Bronze plates placed around this Scottish fishing village form a true-scale model of the solar system.

360° views of the city plus five floors of optical illusions and hands-on science.

This 17th-century street hidden beneath Edinburgh was once a breeding ground for the black death.

Over 70 independent businesses have set up shop in this former Victorian department store.

A giant wooden soda bottle pays homage to a distinctly British drink on the very spot where it was invented.

Since 1768, the pillar at Guildhall Market in Bath has been a hub of economic transactions.