One man's vast collection of artifacts and ephemera from matchbooks and postcards to vintage neon signs and cars.

The remains of a hospital ravaged by fire, once a progressive place of innovations for disabled children.

A historic bridge with a lovely acoustic anomaly.

A lighthouse on a diminutive island was one of the first of its kind to guide seamen home.

A cave dug by a man directed by ghosts to find pirate treasure.

Hut with supplies for shipwreck survivors.

Trash escaped from a landfill to fill beaches with all kinds of treasure.

A daybeacon pyramid is about all that's left of this island that is said to have sunk due to a pirate's curse.

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

The often-overlooked ruins of one of the first buildings designed by famous landscape architect Frederick Olmsted.

This tower commemorates the spot where George Washington hoisted the Grand Union flag.

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

The former locus of Boston's high culture has been shuttered and buried for over 70 years.

These whimsical works of art tell the story of the city's past and present.

Shelves covered in dozens of coffee bean varieties fill this North End institution.

These items are all that remain from the room used by the author during his second tour of the U.S.

A more than 260-year-old crypt built on Boston's oldest English burial ground.

The home of one of America's most wealthy industrialists is now a historic site that remembers a more decadent time in the country's history.

The oldest operating apothecary in the US has treated everyone from Thomas Edison to Mark Twain.

A restaurant on Staten Island showcases a different grandmother’s cooking every night.

The "Seinfeld" diner.

Ride the subways of yesteryear.

A hip bar decorated with walls of golden skulls.

A miniature rainforest is growing inside of a Midtown Manhattan office building.