Chelsea's soldiers were given strict orders when crossing this historic bridge.

Folklore says this medieval fortress was plopped atop a portal to hell to trap the demons below.

An underground nightclub helped spark a "Singing Revolution."

Despite dreams of constructing this fairytale mansion, Albert Gotthard Nestor Cedergren never saw its completion.

This bar and museum are devoted to the controversial comic book work of Kája Saudek.

According to tradition this is the oldest church in Venice, but its actual age is a mystery.

A two-way chairlift system between Zugliget and the highest point in the city.

On a winding Vienna side street, one museum has turned their windows into a monument to history’s peace-minded heroes.

Apartment complexes built into huge repurposed natural gas tanks.

In the past, Renaissance sex workers were encouraged to entice customers on this bridge.

Straight out of a nightmare, barcode-faced babies climb up and down Prague's television tower.

This 13th century Gothic brick castle is the largest in the world by surface area.

One of the world's first dedicated bank buildings in the world is now the oldest one.

A striking, modern church devoted to a nun who loved God and beer.

This celebration of Latvia’s freedom and independence avoided demolition over half a century of Soviet occupation.

These small, brass stones commemorate the first Roma victims of the Holocaust.

A massive sculpture of an obscure Celtic coin that has become a symbol in Slovakia.

The tradition of open-air secondhand and antiquarian bookselling in Paris dates back to the Renaissance.

The reconstruction of this prominent building fulfilled a long-written command.

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

This former guildhall with a bacon-like exterior is now home to a museum covering 600 years of Antwerp's musical history.

The oldest continuously operating pharmacy in Europe.

Some of the greatest minds in the history of Hungarian art and science converged in this café.

The location of the world's first telescope demonstration.