Once decrepit and slated for demolition, now one of the longest pedestrian bridges in the world.

This large cave is a summer home to thousands of bats and has a rich history dating back to prehistoric times.

An ancient cave system in Tennessee’s Appalachian foothills converted to a 1,200-person music venue.

Only the original archway remains from the building where a false cry of "fire" started a panic that claimed more than 70 lives on Christmas Eve in 1913.

The birthplace of professional hockey on the shores of Portage Lake.

A museum dedicated to the alleged Roswell Incident.

Hidden in the New Mexico desert southeast of Roswell, nine small deep lakes formed inside sinkholes.

The marker offers a rare chance to be in four U.S. states at once, though there's some controversy over its geographic accuracy.

A phenomenal assembly of pueblos in New Mexico is the most complete example of ancient ruins north of the border.

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

The land is full of geologic eye candy, such as otherworldly spires, mushroom-shaped hoodoos, and prehistoric fossils.

Setting this massive marionette aflame rids Santa Fe of doom and gloom for another year.

These Pre-Columbian petroglyphs contain representations of birds, deer, hunters, and even some early Native flute players.

Once a dining hall for boarding school students, this lodge was a popular haunt for nuclear physicists working on the Manhattan Project.

This museum started as a collection of Manhattan Projects and continues to add exhibits as they are declassified.

Seller of surplus nuclear research materials.

Natural sonic phenomenon comes with a grisly legend of murder and blood.

Its history includes dinosaur fossils, cattle rustlers, Georgia O'Keeffe, and a mythical giant rattlesnake named Vivaron.

A strange sandstone formation in the middle of nowhere presents an interesting climbing opportunity.

A flat-topped butte that makes a constant backdrop for Western art.

Explore the largest pure gypsum deposit in the world, and go dune sledding while you're at it.

These unique volcanic rock formations offer the perfect opportunity to camp and hike.

These ruins of a pre-Columbian cliff village are among the most beautiful and well preserved in New Mexico.

A wealth of pop culture statuary and green chile dishes give this roadside restaurant clout.