Painstakingly built dioramas sit unnoticed in a Boston office building.

This giant Boston statue of Mary is standing on a globe to show her power over the universe.

This ambitious father and son team reigned supreme over the North End, and witches, for many years.

The tomb of Increase Mather and his son Cotton, influential colonial ministers obsessed with the occult.

The history of the tea trade is told in bas-relief on this historic pair of Boston doors.

The former locus of Boston's high culture has been shuttered and buried for over 70 years.

Narrowest house in Boston.

Beautiful steampunk ghosts of early Massachusetts.

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

The American Revolution was galvanized into serious action due to the tragic clash with British soldiers that occurred at this location.

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

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

Dim sum, served in a grand old theater.

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

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

One of the oldest used bookstores in the U.S. has been selling antiquarian treasures since 1825.

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

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

This marker identifies the location where three states converge.

The remnants of the base where US Army troops learned how to fight in extreme conditions.

In the early 1900s, hundreds of Black Americans found opportunity in this now-abandoned rural community.

The giant stump of the once towering cottonwood where Ute people held tribal meetings.

Happen to come across a dead eagle? Send it to America's official dead eagle warehouse.

This restored farmhouse is a time capsule of a 19th-century Colorado homestead.