The only natural lake in the world that drains into both the Atlantic and Pacific Oceans.

One of nature's most well-scheduled phenomenons resides in Wyoming's Yellowstone National Park.

The largest hot spring in the United States is, as the name suggests, a stunning show of natural color.

A beautiful geyser under environmental threat.

The first declared National Monument in the United States.

A smoke stack so large, the Washington Monument could fit inside!

One of the few surviving Panama Canal steam shovels stands outside a tiny Colorado mining museum.

Hidden high on a remote mountain peak is a humbling and mysterious Vietnam War memorial.

This was once the home of Gahan's Saloon, Denver's most storied speakeasy.

A futuristic hovertrain is parked unceremoniously alongside a nondescript road.

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

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

The world's largest carnivore sanctuary is home to over 450 meat-eating rescues.

The final resting place of American icon Buffalo Bill, and a museum that aids in telling his tale.

This iconic science fiction house still looks like something from the future.

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

This immigrant bridge once spanned the Thames but is now a fixture of an Arizona city.

Ancient pueblos built into the base of a natural canyon wall.

Some of the tallest ancient American ruins continue to inspire awe and curiosity.

This historic national park is covered in the stunning ruins of red rock pueblos.

Ancestral Puebloan ruins, natural arches, and box canyons abound in this seldom-visited corner of Monument Valley Navajo Tribal Park.

Ninety feet off the valley floor is an ancient dwelling put under protection of the U.S. government by Teddy Roosevelt.

This secluded aqua waterfall in the Grand Canyon is the perfect swimming hole, and the Havasupai tribe's fiercely protected natural wonder.

Dramatic river bend surrounds a natural red-rocked pedestal.