The oldest surviving botanic garden in the United States.

This palatial botanical garden is home to one of the largest pipe organs ever installed in a private residence, and a piece of Wood's cycad.

This eerily well-preserved coal town was saved from destruction by a Sean Connery movie.

These beautiful ruins deep in the Pennsylvania woods are thought to have been a ski lodge or a speakeasy, but no one really knows.

Mural made of 100,000 pieces of hand blown glass, and until recently, the largest glass mural in the US.

A toxic ghost town sitting atop a massive coal fire.

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

America's most famous museum of medical oddities is home to the remains of Albert Einstein's brain.

A town wears its heart on the sleeve of a smiling girl, arms flung wide open in a cheerful greeting for all who encounter her.

A 12,000-year-old bog boasting rare plants and fauna.

The once-abandoned 140-year-old hotel used in the movie "In Dreams."

The old fire tower is one of the last of its kind in the United States.

This giant meditative chakra sits peacefully in the Flathead Valley of western Montana.

This artful dam holds back a crater-made reservoir that can be seen from space.

This structure among the trees was the result of divine inspiration.

It may take some time to locate, but it's sure to warm even a heart of stone.

An abandoned town is hidden in Great Smoky Mountains National Park.

This homegrown adoption center offers a wonderland of feline companionship.

A failed utopian experiment for British expats in the American South is now a Victorian village frozen in time.

Walk the whole Mississippi River!

Railroad came. People came. Railroad left. Town died.

For two weeks every June, fireflies in the Smoky Mountains perform an astonishing light show.

Underground tunnels remain beneath this abandoned mental asylum.

A religious-themed park filled with folk art to bring biblical stories to life that fell into disrepair and now being restored.