Rising from the sea like a stone monster.

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

In this historic region, homes and churches are carved into ancient volcanic rock formations.

This Irish show cave is said to have been the site of a Viking massacre that claimed 1,000 lives.

This everlasting lightning storm may be the world's largest generator of ozone.

Museum dedicated to the sacred leaf of the Andes.

If you can look past the nearby sewer pipes, this urban sinkhole grotto is a mini-paradise.

An underwater restaurant, surrounded by a coral reef.

Underwater art project will double as a massive artificial coral reef to help regenerate the damaged ecosystem.

These azure waters were thought to lead to the Mayan Underworld.

Enchanting cave with a river crashing through the roof.

Former drug lord’s manor, now a theme park. Watch out for the hippos.

The largest stone moai on Rapa Nui.

A set of ancient drawings in the desert of Peru that are so massive, many of them can only be fully seen from the sky.

This picturesque view of the Scottish Borders was beloved by Sir Walter Scott.

A focal point of the Cuban government, this city square features one of the most iconic images in the country.

This secluded aqua waterfall in the Grand Canyon is the perfect swimming hole, and the Havasupai tribe's fiercely protected natural wonder.

The intricate stonework of Machu Picchu serves as a testament to Incan engineers.

An urban laboratory.

See massive fossils that are over 200 million years old in northeastern Arizona.

This imposing Masonic temple a mile from the White House was the first public library in Washington, D.C.

This vertical pinnacle in China was the inspiration for the floating mountains in the movie “Avatar.”