A few stone foundations and an old graveyard are all that is left of this once thriving settlement in the wilds of Connecticut.

The ravine where Jesse James supposedly performed an impossible jump to evade capture.

An experimental, automotive replica of Stonehenge.

Despite repeated attempts to make it work, this former mining town is now nothing but dust and memories.

Dedicated to the history of the 1,000 nuclear missiles that once covered the Great Plains.

This magnificent museum claims to house the cranium of a disciple and the skull of a pope.

A state-of-the-art medical facility from the Imperial era is now a derelict ruin.

A faded reminder of what was once a common sight in London during the Blitz.

A labyrinth hides in plain sight at each of the city's 270 Tube stations.

Richard III supposedly disposed of his nephews' bodies here in an effort to seal his claim to the throne.

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

A glorious pub known for a spiteful printing feud and its famous typeface lost—then found—at the bottom of the Thames.

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

Remnants of cells from the most notorious London prison may lie in the basement of a rare Victorian Gin Palace.

A network of concealed passageways lies within a busy London Underground station.

The largest of London's subterranean rivers and once a mad, bad center of London life.

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

An alleyway plaque is all that remains of the independent Texas' envoy that forgot to pay their rent for over a century.

The remains of Crystal Palace Great Exhibition of 1851.

A vast overgrown cemetery, once known as one of London's "Magnificent Seven."

An unusual round church in London with a Templar past.

A subterranean ice warehouse that has lain hidden beneath central London for over a century is now open to the public.

Winding paths and ramshackle mausoleums in the oldest "park cemetery" in London.

The perfectly preserved underground rooms where Churchill plotted the war against Germany.