This former mining railroad is one of the best-preserved short lines in North America.

A sprawling collection of over 106,000 toys from around the world.

This innocuous New Mexico storefront was once the secret jump-off spot for Manhattan Project scientists.

The oldest continuously occupied public building in the United States.

This giant pocket watch is the third iteration of a local landmark that has been standing just off the Santa Fe Plaza for over 100 years.

The railroad turning train travel into a cinematic, highly immersive experience has a fascinating connection to Game of Thrones.

Step back in time at an outdoor living history museum where New Mexico's cultural traditions come alive.

One of Ayutthaya’s most iconic locations is a mysterious, hauntingly surreal miracle.

The highest concentration of Art Deco buildings in the world.

Dolphins, ancient clams and hundreds of waterfalls make this one of the world's top tourist destinations.

This strange geological landscape erupts with sudden bursts of water.

New Zealand's epic shrine to all things puzzling.

The glacier tucked within a New Zealand rainforest.

Nuclear reactor created the plutonium used on Nagasaki.

The remains of Abó, Gran Quivera, and Qurai are monuments to the long, complicated history of the Indigenous people of the Southwest.

Few things look more out of place than the electric blue ponds in the reddish-brown desert of Utah.

Native Americans built this circle of stones, which was used to predict astronomical events.

High in the Sacramento Mountains, a facility dedicated to studying the sun.

A cave's rare beauty held a cavernous secret hidden underground.

This cave column thousands of feet below the earth’s surface is rightly named for one of the most colorful park rangers in history.

This largest dinosaur tracksite in Wyoming is one of the only in the world from the Middle Jurassic Period.

Indiana's first constitution was drafted in the shade of this elm tree in the summer of 1816.

This Memphis recording studio launched the careers of Jerry Lee Lewis, Johnny Cash, and Elvis Presley.

A Memphis park where you can walk the whole Mississippi River in one go.