Marking the spot where a conquistador gave up his search for the fabled Seven Cities of Gold.

One of the Eight Wonders of Kansas and the first official National Natural Monument these stark formations look like nature's Stonehenge.

The mysterious, fantastical woodland inspiration for "The Lord of the Rings."

A island reachable by a causeway at low tide is possibly one of the earliest Western European locations to be identified in text.

Breathtakingly blue walls shimmer inside the "Glacier Behind the Town."

Grandpa Rainbow felt the neighborhood needed some color, so he picked up a paintbrush and went to work.

An extraordinary natural landscape of mountains, waterfalls, and rocky cliffs riddled with tunnels.

An ordinary pond with fish from out of this world.

A magical place that lets you play in and explore the world of Studio Ghibli.

Reportedly 1,400 years old, this may be the first of the Fiji Mermaids.

Enormous underground chamber built to detect 'ghost particles' of the universe.

This ancient temple is set up to take you on a pilgrimage of self.

Hot springs monkey spa in the middle of Hell's Valley.

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

Naturally protected city carved from a rock face.

A deadly ancient portal to the underworld.

Roman ruins top white travertine terraces formed by ancient hot springs.

These tombs were built into the side of a mountain so that ancient angels could reach the dead.

Hidden just under the waters around this Turkish island are the ruins of a once great city.

A Lycian city of the dead carved into the hillside of Southern Turkey, complete with startlingly human touches.

Roman ruins, natural methane fires and a lovely beach.

Once described as the "Eagle's Nest," this ruined ancient city rests on a remote mountaintop.

These termites have an large and deadly abode—impressive by day, dazzling by night.

A beautiful opera house in the heart of Amazonia has recently restarted performances after a 90-year hiatus.