The mummified relic of St. Catherine sits forever on a golden throne.

A 19th century artistocrat's mansion, turned into a library, hidden in a modern library.

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

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

Dictionary Johnson’s favorite feline.

A naturally mummified 2,000-year-old man.

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

An unusual round church in London with a Templar past.

Hear the quietest sound from across the dome.

The John Snow Memorial marks the epicenter of London's 1854 cholera epidemic.

London's creepiest cemetery was once the site of dueling magicians and mobs of stake-carrying vampire hunters.

The vast, legendary catacombs hold secrets much stranger than stacked bones.

The ancient tomb acts as a calendar that keeps perfect time.

During prohibition, corrupt city officials ran drinking dens under the streets of Downtown Los Angeles.

The largest catacomb system in the world.

The world's largest bioluminescent area was undiscovered by science until 2005.

A fiery crater has been burning in the Karakum Desert since 1971.