Victorian-era Londoners really wanted to believe this 17th-century cistern was actually an ancient artifact.

Tombstones and enigmatic inscriptions hide within a vault beneath a popular London arts venue.

These ornate arches show how the course of the River Thames has changed.

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

The world's oldest optical museum is an odd collection where the exhibits look at you.

A living memorial to the trees London lost during the Great Storm of 1987.

Colorful murals by Jean Cocteau hide within this peaceful London sanctuary.

More than a million titles fill the labyrinthine shelves of this prestigious private library.

The lab where the scientist made his groundbreaking discoveries is preserved on the basement floor of the Faraday Museum.

Heralded as the oldest statue in London.

Never actually a tree at all, this spot was the site of London's public hangings for nearly 600 years.

A plaque marks the underground site of one of London's "lost rivers."

After 800 years, Europe's oldest elm tree has met its end.

This knockout museum lies in a sleepy corner of London.

The collection contains over 25,000 items and details the painful dental practices of the past.

An eccentric Victorian aristocrat's enormous collection of medieval armor and weapons from around the world.

One man's attempt to stay one step ahead of the church.

No one's quite sure why there's a metal megaphone bolted on two rocks in the middle of the Mojave Desert.

A marvel of Byzantine engineering under the streets of Istanbul.

The hidden "ballroom" under a mansion lake was built by a criminal who ate a cyanide pill during his trial.

A peculiar mansion built by the troubled heir to the Winchester Rifle Company fortune.