This area was once known for being a lawless haven for rough-and-tumble sailors, earning the maritime-themed nickname "the black sea."

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

Trash escaped from a landfill to fill beaches with all kinds of treasure.

The thousands of shades on display — some toxic, others impossibly rare — are a library of more than just color.

The strikingly modern structure stands out among the brick buildings speckling the Harvard Business School's campus.

Site of an oft forgotten and revolutionary battle.

A morbid secret lies hidden within the beautiful walls of the Boston Athenaeum.

Hill-like structures formed by glaciers and sandy spits of land.

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

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

This tower pays homage to a legendary Viking fort established in Massachusetts that never really existed.

This Dutch-styled residential building was originally a cocoa company's World's Fair showpiece.

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

The oldest surviving wood-frame building in North America is still in the family.