This iconic Parisian bookstore doubles as the "Tumbleweed Hotel" for traveling writers.

Once a place of peaceful repose, this sanitarium now faces an uncertain future.

A 1,215-foot tunnel transports pedestrians beneath the River Thames.

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

The accidental discovery of this gilt bronze head led archaeologists to find the Roman Baths in the city of Bath

In addition to escorting prospective couples to and from ballrooms, this lane was also a place for gentlemen to settle scores.

Created by one of England's most prolific labyrinth designers, inspired by Bath city history.

This picturesque horseshoe weir was first built in the 1600s to prevent flooding in the town of Bath.

This restaurant's specialty is "a major enigma for food historians."

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

For more than 170 years, this family-run bakery has been serving Berlin’s best Baumkuchen, or “tree cake.”

A monument to the three wars that led to German unification towers within a Berlin traffic circle.

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

An eerie, derelict amusement park in Berlin.

The best bagels in Berlin are tucked away in an independent bookstore.

A whimsical and twisted animatronic monster tour beneath the streets of Berlin.

A narrow passage next to a cafe leads to a courtyard exploding with murals, tags, and paste-ups.

A memorial in the Tiergarten is a reminder of the suffering inflicted on homosexuals by the Nazi regime.

This water-tower-turned-high-end-apartment building was once the site of an early Nazi concentration camp.

A rocky Irish outcropping with a history of wealth, conflict, and ruin.

Explore 10 acres of environmental sculptures.

The exterior of this home was used for the hit television show, The Brady Bunch.

High on a hill overlooking Los Angeles lives a world famous, high-power conical Tesla Coil.

There are lots of hands and feet stamped in the cement in front of Grauman’s Chinese Theater, but Mel left behind something extra.