Go deep on these fascinating fish, and get a bonus lesson on the importance of marine conservation.

Here, at the “world’s longest art gallery,” you’ll find forty miles of ancient petroglyphs and pictographs.

A volcanic crater that visitors can look inside.

The world's most remote airport.

This large round boulder is said to emit spiritual power, but it may just be magnets.

This was once the center of the Birdman cult, and is now a World Heritage Site.

The largest stone moai on Rapa Nui.

The ominously named cave is home to some remarkable ancient art.

It's just another skyscraper, but it's shaped like '90s cell phone.

This sculpture meant to honor the bravery of the Indigenous Mapuche people of Chile proved controversial.

This museum covers 10,000 years of Pre-Columbian Latin American history.

A life-sized imperial army, buried in battle formation, has stood underground for over 2,000 years—built not for war, but for eternity.

The largest salt lake in the Sahara is mysteriously alluring.

The ancient heart of Tunis is an enormous maze of narrow streets and alleyways.

The largest and best-preserved Roman amphitheater in Africa was designed to seat 35,000 people.

Strange red rock formations that have been attributed to a higher power for hundreds of years.

Air Force Academy Chapel made of 100 identical tetrahedrons works to inspire those of all religions.

Half-sized replica of the Leaning Tower of Pisa built to honor Galileo.

Stalinist skyscraper built with help of cryotechnology.

This "second" cemetery represents New Orleans' attempt to keep cholera at bay.

Once in disrepair, this popular Texas stop along iconic Route 66 has been restored to its past glory.

A roaring, awe-inspiring double cascade of icy water flows through woodland Oregon like something out of a Tolkien novel.

This extravagant Art Nouveau rest stop features a million-dollar view of the Columbia River.

The original movie set for the home of 'Star Wars' hero Luke Skywalker.