In this cobwebbed old operating theater, you can practically hear the screams of the unanesthetized patients.

Giant, friendly pelicans in Central London, the most unlikely of places.

A building so large that it has its own weather.

The museum chronicling a treasure hunter's dream, fulfilled.

A monument celebrating the idea of reaching inaccessible places.

A massive sea stack famous for its appearance in The Goonies.

A Roman-style column in Oregon hides a spiral staircase inside.

A walk through the historic city center, under the streets of Seattle.

Millions of glowing microscopic organisms light up the waters of this luminous lagoon.

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

Rebuilt remains of a temple to Roman god Mithras.

This haunted hotel built on natural springs once served as a hospital for a quack doctor promising a cure for cancer.

This life-size bronze statue remembers the tallest recorded human in his Illinois hometown.

Once one of the world's great cities, Cahokia was a place of religious worship, trade and mass human sacrifice before being mysteriously abandoned.

A historic house in St. Louis was plagued by a series of suicides committed by family members involved in a successful brewery.

Erosion and time have created a naturally-formed water park.

European castle ruins in an American state park are actually the product of death and grief.

A museum marks and documents the site of the Titanic's launch.

Hear the quietest sound from across the dome.

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

A cluttered and astounding collection of antiquities and curiosities.