The maximum security facility was once thought to have "the bloodiest 47 acres in America."

One of the last remaining World War II Victory Gardens in the U.S. is quietly growing across from Fenway Park.

The narrowest house in America is seven feet of pure spite.

This cemetery has graves dating back to the 17th century, including the city's oldest carved tombstone and an ominous cryptogram.

During the 19th-century, this park was a vital trading fort.

One artist’s scheme to expand museum viewing hours into the evening led to the illumination of an entire city.

Chilly air billows out from the entrance of an abandoned mine on a steep hillside, providing a refuge for Ice Age fauna and flora.

Its vintage camera collection gives a snapshot of the past as viewed through a photographic lens.

A volcanic landmark located on an Ice age lake bed.

Dive bar built out of the remains of a whaling ship.

Natural rock water slides hidden in the remote forests of northern Idaho.

A sprawling collection of over 106,000 toys from around the world.

The remains of a 12th-century chapter house in Golden Gate Park.

The railroad tunnel nicknamed the "Bloody Pit" for taking the lives of hundreds during its construction.

The U.S. Supreme Court's secret Cold War relocation facility in the mountains of North Carolina.

This grave in a ghost town cemetery marks the death of a witch on a day that never happened.

An abandoned railroad tunnel forgotten by time awaits inquisitive hikers.

Visitors are welcome to enter this lush Key West sanctuary to entertain its plethora of rescued parrots.

Ship skeletons haunt Baltimore's waterways.

The face of a woman pushes its way through the earth.

An ever-growing collection of rare and strange objects owned by local Arkansas illusionist Maxwell Blade.

This remarkable collection devoted to the study of fish includes 1 million preserved specimens from all around the world.

137 graves holding New England's earliest residents.

A natural history wunderkammer in the middle of the desert.