These mysterious ancient stone spheres were created by a civilization lost to time and are now mostly lawn ornaments.

This Arctic mining town is home to a cat that's spent years masquerading as a fox.

A historic lighthouse steeped in rumors of ghost and pirate stories.

Buy a token from the liquor store and you can make this beast spew flames on command.

The only surviving piece of a submarine said to be the most decorated vessel in U.S. history.

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

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

The fifth-longest natural arch in the world, and the longest outside China.

Stroll through a wonderland of stupendous moss-covered trees.

The second tallest railway trestle bridge in America.

This rustic old building is said to be the most photographed barn in America.

The high point on the 16th president's eponymous roadway is marked by a massive version of his head.

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 winding route passes through an enclosed alleyway, two tunnels, and leads to the White House basement.

A tiny monument to the unsuccessful attempt by Thomas Jefferson to place the prime meridian in Washington.

The beloved statue at the National Academy of Sciences is oh so inviting to sit on.

Those with a sharp eye can find the hidden image of a German Shepherd on the memorial's Mural Wall.

Yale University's home for rare works, including the mysterious Voynich Manuscript.

From the sky, a kaleidoscope of color brightens the grey landscape of the San Francisco Bay.

A unique geological area spiked with wind-carved rocks that resemble teepees.

Where once there was a train station bathroom, there is now this German burger joint.