Ancient and modern architecture are joined in Louis Kahn's monument to democracy.

999 stairs lead visitors through a massive hole in a mountain known as the Gateway to Heaven.

Remnants of the most densely packed city in world history, that thrived on anarchy for 30 years.

Intensely colorful calcite pools in Southern China.

The ancient settlement attracts tourists from all over looking to learn about the Chinese vision of the afterlife.

Man-made waterfall is the tallest in Mainland China.

A fantastic assortment of China's finest and most disturbing wares.

Worlds' largest inhabited river island.

Abandoned silver mine strewn with wrecked and twisted structures.

A collision of human error and natural geothermal pressure created this rainbow-colored geologic wonder.

First a horse rendering plant, then a 19th century landfill, this beach is full of glass from thousands upon thousands of broken bottles.

Death road of Bolivia.

China's biggest e-waste village.

Rusting ships sit in a desert where a sea used to be.

Oddly touching memorial to a little-remembered nuclear tragedy.

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

The ghost town left by the worst nuclear disaster of all time is being taken over by nature and urban explorers.

A scenic overlook of a pit mine hundreds of meters deep filled with blue water.

A small flooded ghost town with a few scattered structures remaining.

A toxic ghost town sitting atop a massive coal fire.

An enormous concrete structure built over a nuclear crater.

Where giant ships go to die.

Snow-capped peaks, colorful waterfalls and stunning vistas on the edge of the Himalayas.

A small village in India bears witness to the end of birds' lives every September.