This striking landscape in northern Vietnam contains both geological and archaeological wonders.

This razorback ridgeline has doubled as a scenic drive since the early 1900s.

A futuristic hovertrain is parked unceremoniously alongside a nondescript road.

The scene of one of the darkest moments in American labor history has been left essentially untouched since the tragedy.

This spectacular track has run continuously since 1882.

Once a mortuary that held the remains of Buffalo Bill, this Denver hotspot is now a death-fixated restaurant.

This naturally-sourced hot spring is now home to a clothing-optional resort.

Check out a hidden collection of vintage neon signs.

In the 1950s, two women saved this grand theater in the Colorado mountains from demolition.

For over a century, it has been a tradition to raise a flag at the top of this 450-foot sandstone pillar on the 4th of July.

A short but powerful waterfall resides amid Colorado’s Great Sand Dunes.

This Colorado fire station has been in continuous operation for more than a century.

Overlooking the Colorado Convention Center is this giant sculpture made from thousands of triangles.

Only a few signs remain of the buried Colorado mining town that supplied the uranium for the first atomic bomb.

The narrow mountain road that carves a path between Florence and Victor is tied to ghost towns and ghost stories.

A mural of the Virgin of Guadalupe painted on the rock wall by canyon's religious namesake.

Take a dip in the world's largest mineral hot springs pool.

A dangerous narrow-gauge railroad once traced a route through this striking canyon.

Two tall rocks sit at the center of this site, once the home of a large Ancestral Puebloan community.

A multiversal transit station located right below a highway interchange.

A glimpse of a waterfall is reached by a steel catwalk along a slot canyon located in an Ouray city park.

The giant stump of the once towering cottonwood where Ute people held tribal meetings.

Inside this shop, visitors are treated to a unique blend of natural history and art.

The decaying ruins of a failed mining company’s water diversion project cling to the side of a desert canyon.