An out-of-place Air Force radar dome is all that denotes this park as a former missile launch site.

This small glass cube is a peaceful out-of-the-way sanctuary at the busy airport.

One woman’s obsession gave birth to this lovely oddity at the Boston Public Library.

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

Nuclear reactor created the plutonium used on Nagasaki.

Welcome sign announcing Haverhill, MA, as the birthplace of horror rocker/artist/director Rob Zombie.

This massive World War II calculator hearkens back to the days when "computer" was a job title.

At the supposed instruction of Ben Franklin and Socrates, a Spiritualist believer intended to birth a mechanical messiah here.

The sprawling, eccentric estate of Ames and Ames, a brilliant botanist, and a genius inventor and artist.

A spooky and decrepit mental health facility is slowly being replaced with newer digs.

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

The self-proclaimed world's smallest museum, located next to a Massachusetts sandwich chain.

Located just behind a quiet residential neighborhood, this is ground zero for the Salem witchcraft hysteria of 1692.

Around 160 years ago, this spot marked the location of a wharf along the shores of the Charles River.

The remnants of a Gilded Age elegance preserved in the middle of a stark modern tower.

Painstakingly built dioramas sit unnoticed in a Boston office building.

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

19th-century operating theatre in which the use of ether was first demonstrated - plus, a skeleton and a mummy!

This World's Fair showpiece was built in Chicago, but shipped to Maine.

Walk the same tracks that once ferried Gilded Age aristocrats to their vacation destinations.

An elderly widow still operates the incredibly detailed model railroad she and her husband built by hand.

A roadside park in eastern Maine first marked the halfway point between the equator and North Pole with a brass pin in 1896.

Steam engines and conveyor belts are remnants of a genius system left in the middle of the Maine woods.

A giant telephone commemorates the last "crank" call ever made in the U.S.