Hidden inside this Arizona fast food franchise is an in-depth exhibit on the famed WWII counterintelligence program.

At certain times in the fall and winter, the sunlight makes this natural sandstone arch glow.

An island off the coast of South Australia is home to the last purebred Ligurian bees.

This splendid Versailles-inspired mansion has the largest French-style formal gardens in North America.

A multicolored mineral mound dribbles piping hot spring water right off the side of a highway.

Gladiators once walked this ancient, subterranean passage.

An impressive site containing some of the earth’s rarest living fossils.

See the imprints of ancient trees, burned and preserved by lava.

This manor in the woods memorializes one of the greatest birders of a generation.

Its original statue was deemed so ugly, locals called it “Scary Lucy.”

The world's only statue dedicated to the greatest Great Dane in comic strip history.

More than 350 million years ago, western New York was covered in a vast sea. Today, you can dig up the remains of the plants and animals that lived there.

This Frank Lloyd Wright summer house was designed along Lake Erie as a retreat for a client's wife.

This historic fort spans more the 300 years.

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

A monument to a Polish general who fought the American Revolution and became the "Father of the American Cavalry."

This Buffalo museum hides an Art Deco gas station designed by Frank Lloyd Wright.

This restored house is like a time capsule of the president's unconventional inauguration.

The only boathouse Frank Lloyd Wright ever designed was also the only unbuilt structure in his famous Wasmuth Portfolio, until 2007.

The site of William McKinley's tragic assassination is only marked by an underwhelming boulder.

One of Frank Lloyd Wright's greatest—and favorite—architectural masterpieces was almost lost.

The little-known final resting place of one of America's greatest writers.

All that remains of one of the Civil War's more deadly POW camps is a simple flagstone.

The final resting place of Harriet Tubman and other famous historical figures.