Seemingly grown on some other world, these New Mexico rock formations look like a disused science fiction set.

An eclectic collection of artifacts from the Wild West is preserved in a remote fictional pioneer town.

The ancient dwellings of the Puebloans, located in the cliffs of majestic mesas.

Abandoned silver mine strewn with wrecked and twisted structures.

A little-known hot spring haven right below the highway.

The remnants of the base where US Army troops learned how to fight in extreme conditions.

Once an unstoppable source of gold and silver, this town came to a grinding stop when the groundwater proved deadly.

On a barren hillside in the Yucca Valley, the recently restored Desert Christ Park has attracted pilgrims and kitsch hunters for over 50 years.

Explore 10 acres of environmental sculptures.

A bronze of the man in all his sinewy glory celebrates his longtime connection to the Ohio city.

One kilometer of thick brass rod laid out before your eyes.

A room in New York City that contains 250 cubic yards of dirt worth a million dollars.

Hidden in Central Park's Ramble is a troublesome cave buried just beneath the surface.

Whisper secrets in a busy station only to be heard on the other side of this acoustic arch.

The feral felines of Roosevelt Island have a small army of allies and an abandoned hospital all to themselves.

A semi-scholarly approach to sex.

Every equinox this Maya pyramid puts on a spooky ancient light show.

No telescopes, no power, no gift shop: The Observatory of Chichen Itza, one of the world's oldest observatories, takes astronomy back to basics.

The meteor that sealed the fate of the dinosaurs landed at this site, one of the largest impact craters in the world.

One of the few places where you can visit a cenote and Maya ruins at the same time.

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

The third tallest lighthouse in America once guided author Stephen Crane to safety.

The lost town of Neversink, sunk by New York City.

An abandoned asylum once on the cutting edge of lobotomies may be reborn as a Christian college.