Secret refuge and museum of the Duke of Florence.

The bright red cars take travelers through breathtaking Tuscan scenery.

These lovely Turkish-styled baths were brought back to life after winning a reality show competition.

This 19th century police station now puts the history of the Manchester City Police on display.

Site of a classic 19th-century physics experiment to prove the earth is rotating.

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

The vast, legendary catacombs hold secrets much stranger than stacked bones.

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

This classic restaurant features a gorgeous mirror-clad room.

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

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

The most visited, and possibly most controversial, museum in Germany.

Cold war icon and onetime "hole" in the iron curtain.

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

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

One of downtown Berlin's last reminders of its Communist past.

Visitors can explore the role of mysticism throughout the ages inside this interactive museum of magic.

The site of the famous Nazi book burning campaign of 1933 remembers its "Night of Shame".

This Manchester laundromat is hiding something.

The Habsburgs' royal collections of art and wonders.

A rooftop restaurant hides in plain sight atop Vienna's Palace of Justice.

A little sculpture with a large wardrobe.

Cozy basement bar sports an inventory of over 2,000 beers.

St. Mary's features one of the most spectacularly decorated cathedral interiors in all of Europe.