This railroad tunnel was once the longest in Massachusetts.

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

An enormous, inside-out glass globe built in 1935.

The oldest Italian café in Boston, this spot also serves as a veritable museum of vintage coffee ephemera.

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

From economic backbone of a community to deadly diving hole, these former stone quarries are now a park for rock climbers and graffiti artists.

The macabre graffiti spectacle in a quarry in a Massachusetts forest reservation.

No one really knows how these old hobby horses got here, but the herd keeps growing.

Museum dedicated to awful artwork.

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

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