The only swimming pool listed on the National Register of Historic Places is emptied and refilled each day with naturally filtered water.

A coastal rock outcrop with mysterious inscriptions variously attributed to Native Americans, Portuguese, Phoenicians, Norse, and more.

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

The site of the first "historically true" UFO encounter in the U.S.

This massive tea kettle was once a promotional stunt for the Oriental Teashop.

This railroad tunnel was once the longest in Massachusetts.

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

Impossibly life-like natural history models created out of glass by a father and son.

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

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

"Mock all and sundry things, but leave the saints alone."

An extra-wide chair built to accommodate the former president's big behind.

This last stalwart of the now-forgotten feminist restaurant movement has been serving food in an activist atmosphere since 1977.

An easy-to-miss plaque marks the building that first held this 19th-century telephone innovation.

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

This stunning Connecticut mansion is actually just a one-room-deep hoax.