A strangely curved lamppost stands tall over this avenue in Rotterdam.

Metro station with a claim to rock n' roll fame.

This grubby wall is said to be one of the Earth's esoteric energy centers.

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

Tucked away in the Tower of London is the weapon once used to execute high-profile prisoners.

The fierce beast perches atop a pedestal marking where the historic City of London gates once stood.

A little slice of Japan and its aesthetics in London's Holland Park.

A charming 17th-century alley is lined with secondhand bookstores and antiquarian shops.

This beautiful deer park was built so King Charles I and his court could go hunting while escaping a deadly plague outbreak.

This hauntingly beautiful cemetery outside a medieval citadel is full of winding paths and ivy-covered graves.

Nine centuries-old fortresses guard the walls of this medieval Romanian city.

Graffiti from the 16th and 17th centuries cover the walls of this part of the Tower of London.

This fairytale inspired, warped building houses restaurants, shops, and a radio station.

Catacombs turned marketplace.

This one has sailed five times as far as Sir Francis Drake's famous ship.

Scattered throughout London are ancient remnants of the city's former bounding wall.

Hauled from the water's depths, Henry VIII's flagship is preserved in this capsule-shaped museum.

Follow the original medieval paths that wind through this intriguing section of the city.

It's possible to walk inside one of the largest Neolithic tombs in Britain.

Six ravens are kept captive (but well-fed) at the Tower of London to prevent the fall of the Crown.

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

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

This classic restaurant features a gorgeous mirror-clad room.

A slice of central Asia in the middle of Berlin.