Discovered by cows, these upstate New York show caves are presented with a healthy dose of psychedelic folk art.

A sacred site for Native Americans surveyed by George Washington and owned by both King George III and Thomas Jefferson.

Famously misunderstood wonder of the ancient world

The first KFC is on the National Register of Historic Places.

These cabins mark the site where our 11th president was born (probably).

Inside a state forest, the forgotten remains of a Cold War defensive installation.

This eclectic homestead is home to a miniature windmill and Connecticut's last tollbooth.

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

A little marble compass above George Washington's (empty) tomb in the Capitol marks where D.C.'s four quadrants intersect.

The walls of the iconic dome are hollow and have a secret stairway.

This charming colonial alleyway is one of the oldest continuously used residential streets in the U.S.

World's first "penitentiary," meant to be humane, drove men insane.

Known as one of the most climbed mountains in the world, this barren peak is permanently bald thanks to an anti-wolf fire.

A beautiful Gilded Age hotel in the White Mountains with surprising diplomatic history.

The highest point in the state of New Hampshire, and while unlikely "the worst weather in the world," it sure seems that way to hikers.

This tiny patch of arid sand sits in one of the greenest states in the United States.

These powerful, if squat, Canadian waterfalls flow in different directions depending on the time of day.

Iconic rock formations that allow for exploration during high or low tide.

This lovely, if imposing, piece of Canadian gothic is possibly the most photographed hotel in the world.

A contemporary fresco movement illustrates the region's rich history.

This steep cable railway has been hoisting passengers in the heart of Québec City for over a century.

City law dictates that this mountaintop cathedral containing the heart of a saint is to remain the tallest building in town.

A massive Montreal stadium that has seen nothing but trouble since its inception.

Its columns were all carved from the same white oak tree.