This giant boulder is pinched over a 1000-meter abyss by two mountains.

A solar-powered primary school inspires hope and experimentation in a country ripe for energy innovation.

Michael Heizer's masterwork in the Nevada Basin.

A museum dedicated to a sea that should have never been.

Fascinating early attempt at a Jewish autonomous settlement.

This deceptively salty lake looks like blushing pink lemonade.

Earth's greatest purely vertical drop at 4,101 feet.

The only remaining Jewish congregation in Greenpoint.

Adherence to strict Jewish laws is required to enter this ultra-conservative New York village.

The prototype for all Nazi concentration camps.

The first declared National Monument in the United States.

A theme park that suffered massive flooding during Katrina was abandoned, and now proves irresistible to trespassing explorers.

One-time largest man-made structure in the world will be a park in 30 years.

An amusement park on the grounds of an unused nuclear power plant, with a swing ride inside the cooling tower.

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

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

A fiery crater has been burning in the Karakum Desert since 1971.

A toxic ghost town sitting atop a massive coal fire.

The largest cave shaft in the world is home to thousands of birds and popular with BASE jumpers.

A peculiar mansion built by the troubled heir to the Winchester Rifle Company fortune.

An ancient capital city that dates back 3,000 years old and harbors many surprises.

A massive, heart-shaped, wind-carved crater in the middle of the Israeli desert.

A hand-built folk art installation covered with messages of God's love.

Dramatic river bend surrounds a natural red-rocked pedestal.