Britain's answer to the NSA is based out of this deliciously-named circular headquarters.

Unwanted and reluctant ownership, Gordon Lamp glimmers faintly and serves as a relic of the bygone Victorian era.

A 160-year-old tower built in honor of a scholar who was burned at the stake for translating the Bible.

Once designed as the entrance to Buckingham Palace, this structure was later relocated and stands as a victory arch.

An "inside out" building in the historical center of Paris, featuring Europe’s largest modern art museum.

High atop the Eiffel Tower is a small apartment built exclusively to entertain the science elite and make the rest of Paris jealous.

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

The celebrated eyesore created by starry-eyed sweethearts.

Lady Liberty's original designer installed a little clone in this French fountain.

The world's largest reflecting pool is just two centimeters deep.

This Bordeaux parking garage has 712 indoor spaces, and one outdoor.

In the U.K., a historic workhouse shines a light on the early, harsh treatment of the poor.

Eyam took steps to quarantine themselves and keep the plague from spreading.

Three memorials honor the victims of the worst sports stadium disaster in Britain.

This commercial and retail center was crafted from walled military barracks.

The whimsical twist of this spire was either caused by the Devil, an unexpected virgin, or lead.

One of the largest medieval barns in England and architecturally one of the finest.

This ruined medieval castle was the scene of Lord Robert Dudley’s seductive reception for Queen Elizabeth I.

Public access to clean drinking water was an instant hit among the masses.

The history of this famed tree ranges from an 18th-century highway robber, to the Scout Association.

London’s first road overpass is so old that it was originally built for horse-drawn carriages.

Down a pint of ale where the Bishop of Ely's servants slept in 1546.

A statue of the original Pearly King is hidden in a church's crypt.

The medieval woodcut-style artwork chronicles life in medieval London.