This supermarket is suspended 25 feet above an interstate highway.

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.

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

Millions of numbers carved in glass represent the tattoos forced upon victims.

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

A former waterfront market is now in the center of town due to some interesting Boston engineering.

This beautiful architectural gem was the first waste treatment facility in Boston.

Run by a eugenics advocate, this aging institution conducted secret radiation experiments sponsored by Quaker Oats.

Once the largest public hospital for the mentally ill was also surrounded by controversy.

On a former island, this old fortification once used to protect the Boston Area and started Edgar Allan Poe in his military career.

Ralph Waldo Emerson spent two years living here decades before it became a Frederick Law Olmsted-designed park.

The often-overlooked ruins of one of the first buildings designed by famous landscape architect Frederick Olmsted.

Palatial mansion estate used in films including "Flowers in the Attic" and "The Witches of Eastwick."

An eccentric inventor's castle home with its own indoor weather system.

Friction between grains of sand cause a curious "singing" sound.

Like stepping into a spooky fairy-tale, this shop carries the dark ideas of artists and other makers.

The only structure left with direct ties to the Salem witchcraft trials of 1692.

Statue in Salem of the woman who starred as the witch Samantha in the sitcom "Bewitched."

A simple but powerful tribute to the 20 victims of the 1692 witch trials.

"Try not to knock anything over!"

The lecture hall where Alexander Graham Bell first demonstrated the long-distance phone call.

The 340-year-old house that inspired the classic Nathaniel Hawthorne novel.

The bears may be gone, but their old cages can still be found.