The home of the first American-born saint is one of the only curved buildings in New York.

A partially hidden wall graffitied by spectators of the 1976 Bicentennial, recently rediscovered.

According to local myth this cemetery is half evil spirits, half good—split down the middle.

This pre-Revolutionary War grist mill ground corn and flour for soldiers in seven American wars.

A local prank turned town icon.

This abandoned dream castle and its cemetery look out over the city that once inspired their creation.

All that remains of a magnate's dream home is a historic gate and an abandoned public pool.

The once abandoned ruins of a Victorian beachside amusement park are now back in working order.

An unrealized dream to wirelessly electrify the entire Earth.

The second-largest (of only two in the world) large particle collider is the underdog of experimental physics.

This forgotten graveyard in rural New York State once served a pioneering hospital.

These mystical miniature houses bring a touch of magic to the New Jersey woods.

One of the U.S. Forest Service's only mansions is outfitted with a dinner table for floating food.

Tucked behind New Jersey's abandoned Gingerbread Castle lie the eerie ruins of a once-flourishing paper mill.

Once in a state of dilapidation, this candy-inspired fortress is now being revived.

These mouldering mansion ruins remember a time when the Catskills were nothing but luxury.

Reclaimed by nature, the ruins of Doodletown, New York are remnants of a town consumed by a state park.

Remnants of a storybook amusement park hidden behind a strip mall.

This dig site outside D.C. is known for its exceptionally high density of baby dinosaur fossils and dinosaur eggs.

The semi-reclaimed ruins of this canal were once part of an ambitious plan to reroute the mighty potomac.

An FDR-era tuberculosis sanatorium has stood abandoned in the suburbs of the U.S. capital for over 30 years.

A double agent hid information for the Soviet Union beneath this bridge for more than 20 years.

The longest escalator in the Western Hemisphere takes over three minutes to ride down.

Once the supplier for noteworthy projects like the National Cathedral, this old brickworks now lies abandoned.