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

This modest marker near Notre Dame identifies the very center of Paris.

A clear example of the process of erosion in action.

Now a museum, this was once a prison facility and a hospital for the “criminally insane.”

Abstract dinosaur models in London.

The remains of Crystal Palace Great Exhibition of 1851.

This legendary stone is of unknown origin, and throughout history has been a literal touchstone for British leaders.

Kings Cross Station pays tribute to its role in Britain's best-selling book series.

The curios of pharmacist and collector Henry Wellcome.

A toy store with a century-long history preserves the craftsmanship of playthings of the past.

One part local history, 99 parts gruesome haunted house.

The broken skateboards that became a poignant memorial to a murdered skater.

This London pub hides a peculiar secret: a recreation of the rooms shared at 221b Baker Street by Sherlock Holmes and Dr. Watson.

London's smallest police station is barely the size of a phone booth.

Eighty million natural history specimens call this gargantuan museum home.

This shell of a historic manor house on the Isle of Wight is said to be the most haunted site on the island.

A medieval replica of King Arthur's legendary table, the Round Table hanging in Winchester Castle was decorated by Henry VIII.

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