All that remains of the Whittall mansion are the ruins of the formal garden and its pergola, dedicated to the late Matthew J. Whittall by his widow.

This tower commemorates the spot where George Washington hoisted the Grand Union flag.

A three-piece musical sculpture installed between the subway tracks at Kendall Station near MIT.

One of the last remaining movie theatres in the country that features a rear-projection system.

The oldest platform carousel built in the United States continues to delight children in Martha’s Vineyard.

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

Memorial to a beloved puppeteer as well as all street performers.

Since 1947, this living history museum has been providing an immersive look at life in Plymouth Colony.

This peaceful Massachusetts graveyard was one of the first "garden-style" cemeteries in America.

This is the house that spite built.

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

The railroad tunnel nicknamed the "Bloody Pit" for taking the lives of hundreds during its construction.

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

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

To find the "unicorns of the deep" you've got to go downstairs.

Illegal drag racing two stories beneath Chicago’s streets.

These pretty kitties killed and ate as many as 135 railway workers.

This $3 million model train takes you through Chicago, Seattle, and the thousands of miles in between.

Four metal statues of massive animal penises stand outside the university's Animal Sciences building.

A railroad magnate's replica village has become home to a genetic seed bank for rare breeds of livestock.

Three and a half miles of cliffs, rocky beaches, Gilded Age mansions and 40 Steps to nowhere in particular.

Known as one of the most climbed mountains in the world, this barren peak is permanently bald thanks to an anti-wolf fire.

If a glacial river suddenly diving into a sheer chasm via a dramatic, multi-stage waterfall isn't peak Iceland, it's certainly close.

One of the tallest buildings in Iceland, and perhaps, the most visually impressive.