One of the steepest streets in the United States makes an intriguing challenge for cyclists.

Collection of trolley cars in the woods represent one man's attempt to preserve transportation history.

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

This permanent exhibition celebrates the finest of our heartless automatons both real and fictional.

A beautiful oddities shop crammed with strange and morbid curiosities.

A stone arch leads to a cavernous 1930s spring house tucked away in the Pennsylvania woods.

Sail through this subterranean show cave that is home to a legend that would go on to name nearly everything around it.

An abandoned stretch of highway, deteriorating next to the operational one.

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

A rare view of a preserved Victorian science museum.

Philadelphia boasts one of the best — and most often overlooked — traditional Japanese gardens in North America.

Tour the dark and beloved poet's former cobwebbed basement, which may have inspired "The Black Cat."

Mysterious rocks that ring musically when struck.

Where America's first doomsday cult awaited the end of the world.

Hellam Township is reputed to feature seven remote gates, which when passed through in the right order, open an entrance to hell.

A layered tribute to the work of mosaicist Isaiah Zagar.

An abandoned cemetery lies in ruins as the surrounding forest swallows it whole.

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

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

A lone tower rises above the cliffs in a city park, offering fantastic views of the Connecticut landscape.

A castle inspired by medieval architecture is hidden in the woods of Connecticut.

A quirky assortment of musical marvels from around the world.

The headquarters of the famous Yale society.

An abandoned Depression-era zoo hidden just off the highway.