A three-piece musical sculpture installed between the subway tracks at Kendall Station near MIT.

One man's psychedelic fence is painted with his cacophonous folk art musings on the world.

This massive World War II calculator hearkens back to the days when "computer" was a job title.

Impossibly life-like natural history models created out of glass by a father and son.

An alley way dedicated to graffiti and street art is a constantly changing street gallery.

The thousands of shades on display — some toxic, others impossibly rare — are a library of more than just color.

An anonymous art project beneath Longfellow Bridge where hundreds of trophies line the steel support beams.

Site of a famous 19th-century transcendentalist utopian community, now abandoned.

19th-century operating theatre in which the use of ether was first demonstrated - plus, a skeleton and a mummy!

Ralph Waldo Emerson spent two years living here decades before it became a Frederick Law Olmsted-designed park.

The Boston square dedicated to the dark poet who was born nearby.

This upscale streetwear store is hidden behind a fake Snapple machine in the back of a deli.

Two thousand artifacts from around the world collected by one woman who loved to travel.

One of the oldest used bookstores in the U.S. has been selling antiquarian treasures since 1825.

A farm in New Jersey grew a most unusual crop for AT&T's testing purposes.

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

Haven for steampunks.

This small, hidden cove is home to abandoned boats.

I fought the law and the precinct caved in.

The most unloved grain elevator in Brooklyn was a “Magnificent Mistake.”

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

This former crime corner has been turned into an eclectic community center.

This lavish room at NYC's French Embassy is a rare relic from the end of the Gilded Age.

This Queens hospital has stood abandoned for almost 20 years after its patients were secretly relocated in the dead of night.