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

Once a bustling fishing port, this semi-ghost town is now more than 90 miles away from the shore.

Former island in the Aral Sea used to be a top-secret Russian bio-weapons facility.

Launch site for nuclear war against Western Europe.

A memorial to the murdered Jews of Kaunas.

A geological bull's-eye visible from outer space.

This dramatic sea spire is home to the world's rarest insect and is part of the lost continent of Zealandia.

Sulphuric gases inhabit a beautiful Japanese island.

An enormous, 30-story-deep hole in the middle of Guatemala City.

Nightmarish example of the unintended consequences of weapons testing.

Site of the largest impact event to occur over land in Earth's recorded history.

Elaborate series of tunnels where traces of mass suicide are still visible.

Below a historic English market town lies a secret underground city complete with kitchens, laundries, storerooms, and an underground lake.

The largest stone moai on Rapa Nui.

This abandoned Navy base was transformed into an off-grid alternative living community for thousands of people.

Island of trash twice the size of Texas floats in the Pacific.

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

This modern French ossuary contains the jumbled bones of 130,000 WWI soldiers.

Death road of Bolivia.

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

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

Natural time capsule containing an alien ecosystem.

In the middle of an extremely unforgiving and desolate high desert is the most secret military facility in the world.

Three columns of volcanic rock shoot out of the ocean.