Harlem park dedicated to compulsive hoarders killed by their own junk.

A memorial marks the library lobby where Langston Hughes' ashes are buried.

New York City's smallest piece of private property.

The first piece of public art dedicated to LGBT rights.

This Connecticut video store has a vast and varied archive that contains everything from 'Koyaanisqatsi' to 'The King's Speech.'

These historic buildings once housed the headquarters of one of the most infamous gangs of New York.

This exemplar of modernist architecture is meant to captivate and inspire students of the Cooper Union.

Whisper secrets in a busy station only to be heard on the other side of this acoustic arch.

A dark patch of the ceiling at Grand Central Terminal which was not restored is still stained brown by tobacco.

Public outcry led to this bridge's unique character which celebrates a giant frog battle and also sewing.

After decades of neglect, a brutalist icon is getting new life as an eco-friendly hotel.

A mysterious echo seems to defy the laws of acoustics.

This lovely little pond is named after the hundreds of soldiers' corpses that were rolled into the waters during the French-Indian War.

An 83-foot tall granite obelisk honors the legacy of Dr. King in the heart of Norfolk's Black community.

This old-fashioned carhop restaurant gave the world the waffle cone.

A cement mixer-turned-kaleidoscope in downtown Norfolk offers different views of the city.

This statue is dedicated to Grace Sherwood, the last person in Virginia to be convicted of being a witch.

The ancient past meets the retro-future at these dinosaur tracks that are protected by a geodesic dome.

This supermarket is suspended 25 feet above an interstate highway.

Located in Faneuil Hall, the headquarters of the Ancient and Honorable Artillery Company of Massachusetts has stood the test of time.

The site of one of the strangest disasters in history—a wave of deadly molasses traveling at 35 mph.

American revolutionaries and British soldiers alike are buried here in the fourth-ever cemetery in Boston.

Macabre headstones carved with winged skulls, dancing skeletons, and pithy reminders of impending death.

This statue intended for children to enjoy became a minor political spat.