Hidden beneath the streets of London is a secret subway that only carried mail.

A mud volcano in Indonesia spews out 50,000 cubic meters of mud every day.

Think you have a tough job? Try carrying 200 kilos through a cloud of sulfur down the side of a volcano.

Site of the largest volcanic eruption in the last 25 million years, one which may have nearly wiped out humanity altogether.

A limestone wonderland of water and subterranean secrets.

Stunning wetlands ablaze with pink lotus flowers.

Surat Thani's official flower—and the world's largest—smells of rotting meat.

This floating cinema brings new meaning to the phrase "going out" to the movies.

Bangkok's men with dangerous jobs come here in search of protective talismans.

A condom-covered Thai restaurant that is more concerned with birth control than food.

Derelict airplane bodies serve as both home and income for three Thai families.

On stormy days debris from this unfinished and abandoned skyscraper rains down on the Bangkok streets.

A treasure trove of pathological, forensic, parasitological, and anatomical specimens.

A museum in a law office, filled with authentic and counterfeit goods.

Structure built from the skulls of vanquished foes.

Bizarrely shaped rock formations in northwest Bulgaria come with equally bizarre legends.

Since 1874, this macabre collection has developed into a museum devoted to Scotland Yard's mementos of dastardly deeds.

The anatomical-pathological collection of a man who changed surgery.

The quaint little store that is said to have inspired a famous Dickens novel was only given its name after the book was released.

Residential building on the Regents Canal is a breeding ground for creativity and innovation.

The most visited, and possibly most controversial, museum in Germany.

A fascinating insight into daily life in the Eastern Bloc.

A surreal museum of extraordinary industrial objects.

A collection of abandoned typographic signs from Berlin and beyond.