One man's fulfilled dream of living on an artificial island made of recycled plastic bottles.

Football field-sized microalgae production tanks on the Hawaiian coast create a stunning view from space.

This North Carolina store preserves a historic moment in America's movement for racial equality.

Hundreds of glow-in-the-dark objects light up a museum in a historic zinc mine.

An enormous playhouse designed to look like 21 stacked Lego bricks, with another 25 million colorful Legos inside.

A 1,500-year-old, 3-story subterranean city where ancient Persians took refuge in times of war.

The remarkably well-preserved final resting place of a powerful ancient Thracian king.

A mysterious ancient network of thousands of perfectly straight lines stretching across miles of Bolivian desert.

The sculpture is made of more than 100,000 knives collected to raise awareness about violence.

A perilous medieval road leading right into the sea.

The only Chinese temple in Mumbai.

Iran's colorful terraces are a rare geological masterpiece.

One of the last doorless, continuously moving elevators still in use in the U.K.

The final remnant of the Arkansas zinc industry is this historically protected ghost town.

This isolated structure beckons adventurers with sublime views of the Faroe Islands.

An abandoned Soviet-era mining town in the mountains of South Kazakhstan.

Bacteria and algae give the salty water its bubblegum hue.

An odd and heartwarming stone marker enshrines the moment a community saved a farmer's pig that fell in a well.

A hidden tunnel of bones in one of Malta's oldest churches.

The world's first and only three-segment bascule bridge folds up into the shape of a capital "N" to let boat traffic through.

A perfect replica of the beloved show's first set.

An impressive century-old, to-scale topographical map of Guatemala.

A popular 19th-century natural landmark is now hidden within a sprawling forest.

Tucked in an urban forest, this restaurant specializes in homemade, healing rakijas.