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

One of the last remaining World War II Victory Gardens in the U.S. is quietly growing across from Fenway Park.

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

A tiny monument to the classic American candy.

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

A unique columnar residence built in the 19th century.

A beautiful Victorian-era cemetery, complete with a miniature village.

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

This former Masonic hall has been turned into an art project that uses even more metaphysical iconography.

On top of Gibbet Hill lie the ruins of a lavish turn-of-the-century estate that never quite came to be.

Three prestigious academic collections come together to create a world-class natural history museum.

The headquarters of one of the world’s longest-running humor magazines bears a noticeable resemblance to a head wearing a Prussian helmet.

This tiny, painted door at the base of a tree stump has been a fixture of the Harvard University campus for decades.

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

Collapsing castle on the Hudson river was once the storage site of military surplus business.

The abandoned husk of a mental institution that failed to save a Jazz Age icon still sits nearly unchanged.

A millionaire's abandoned swimming pool from the gilded age of one of America's most distinguished families.

Beneath the mossy overgrowth covering this once-sprawling campus lies decades of history and the secrets that come with it.

Forgotten under the construction of a new urban roadway is a small, abandoned part of town.

Mansion and shopping center used in the 1975 film "The Stepford Wives."

Retirement home where the actress who played the Wicked Witch of the West passed away.

The world's largest public collection of PEZ memorabilia.

One philanthropist's extensive collection of knick-knacks and curiosities is now a public museum of oddity.

Final resting place of a New Haven urban legend.