A natural gas leak provides a flickering flame beneath a waterfall.

Historical marker that is a mini replica of the original in New York.

One of “America’s Most Endangered Historic Places” is a building shaped like a giant turtle.

One of many reminders of Tesla's scientific contributions overlooks the falls which inspired him.

In the power of this waterfall, Alexander Hamilton saw the potential for industry.

This haunting monument honors the victims of 9/11.

Hidden in plain sight on the Hudson River is an abandoned train station where nature has taken over.

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

This raised bulls-eye visible from space was the subject of an intense geologic controversy.

An absolutely beautiful 200-foot stained glass installation traces the evolution of knowledge.

The Old Courthouse takes visitors on a captivating trip through St. Louis' timeline.

Oversized statues are just the tip of this nostalgic Americana roadside attraction.

When ecosystems collide in the arid Southwest.

These otherworldly limestone formations jut out from the Kansas prairie.

One of the Eight Wonders of Kansas and the first official National Natural Monument these stark formations look like nature's Stonehenge.

Once an ancient sea, this landscape of rocky ravines is filled with the fossils of ancient marine life.

Massive still life just off the highway in Kansas.

When zealous marijuana enthusiasts kept stealing the "Mile 420" highway marker, the State of Colorado got creative.

One of the oldest living oak trees in the Southeast.

Legend says one of the world's largest marine geysers is actually a whale that got wedged within the rocks.

Since World War II people have been decorating this stretch of the Yuma desert with signatures arranged out of rocks.

"Only the devil could play golf here."

Millions of years of oxidation make a drive down this winding Death Valley road surprisingly colorful.

This 4,000-foot-diameter hole is touted as "the most well known, best preserved meteorite crater on Earth."