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

The self-proclaimed world's smallest museum, located next to a Massachusetts sandwich chain.

An astounding collection of medical specimens, including bits of President Lincoln.

A museum devoted to bringing to light forgotten or neglected histories through exhibitions, education and public programming.

A tiny museum housed in a New York freight elevator specializes in the "overlooked, dismissed, or ignored."

A beautiful and abandoned New York subway station from 1904, complete with chandelier.

Unrepaired walls from a 1920 anarchist bomb attack.

This beautiful building in the heart of Manhattan's Financial District was empty for decades.

This lower Manhattan bar is set up in an old bank vault that rests beneath a skyscraper that hides even more historic splendor.

Mural made of 100,000 pieces of hand blown glass, and until recently, the largest glass mural in the US.

In the early 1800s, surgery was also a show.

America's most famous museum of medical oddities is home to the remains of Albert Einstein's brain.

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

Narrowest house in Boston.

One woman’s obsession gave birth to this lovely oddity at the Boston Public Library.

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

No one messes with the Massachusetts sacred cod, not this time...

A mysterious stone embedded at the base of a historic Boston building.

This "life-size" depiction of Mickey Mouse as a half-lobster is both whimsical and a bit creepy, standing guard over the Boston waterfront.

An interesting decoration on this historic site, this weathervane comes with as many legends as it does questions.

A morbid secret lies hidden within the beautiful walls of the Boston Athenaeum.

The site where Charles Dickens gave his first public reading of "A Christmas Carol" in the US.

Less a museum than a bizarre fantasy world created by artists and engineers.

A speakeasy takes on Chicago's drinking culture.