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

More than 5,000 artifacts donated by the people of the city, plus a room entirely devoted to the band U2.

Known as one of the most climbed mountains in the world, this barren peak is permanently bald thanks to an anti-wolf fire.

The skeletal white beams stand as a monument to religious dissent.

This cemetery served as the only official burial grounds in Cambridge for nearly 200 years.

Memorial to a beloved puppeteer as well as all street performers.

One of America's most historic homes also holds a startling literary legacy.

Final resting place of the author who wrote the ghost story "The Turn of the Screw," and his brother, the Harvard doctor and paranormal investigator.

Painstakingly built dioramas sit unnoticed in a Boston office building.

America's original house of worship for Spiritualism, the religious movement based on communing with the dead.

One of the now-less-hidden floral gems of the "Emerald Necklace."

Statue commemorating the use of ether in anesthesia.

Museum dedicated to awful artwork.

The statue of John Harvard isn't actually John Harvard—or even, technically, the founder of the school.

This peaceful Massachusetts graveyard was one of the first "garden-style" cemeteries in America.

Bouncing, delightful, mechanical art at the MIT Museum.

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

This supermarket is suspended 25 feet above an interstate highway.

A historic bridge with a lovely acoustic anomaly.

This Boston medical museum features the skull of the famous medical case of Phineas Gage.

A building so large that it has its own weather.

A small peaceful park and waterfall tucked amid the urban grind of Midtown Manhattan.

This historic address is home to the beloved ball and is an almost totally empty building among the most expensive real estate in the world.

Elevated freight railway turned wildly successful urban park.