Senators used to relax in the nearly forgotten marble tubs now hidden in the U.S. Capitol Building's basement.

The walls of the iconic dome are hollow and have a secret stairway.

One critic described it as "middle Mussolini, early Ramses, and late Neiman-Marcus." Another called it an architectural "natural disaster."

A hidden mid-city oasis, built for pollinators amid the concrete of federal buildings

The story behind this beloved toy—named for Theodore Roosevelt and owned by his grandson—is more complicated than you might guess.

Daredevil repair workers can worm their way out the access hatch, loop ropes over the apex and rappel down the monument.

The monument's pointy aluminum tip has been melted down by repeated lightning strikes.

Look closely and you’ll notice that the color changes a third of the way up the tower.

Decades before the scandal, this staircase on the river was a literal "water gate."

Experience the hysteria of a 17th century witch hunt through goofy reenactments and wax dummies that should probably be burned at the stake.

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

The statue of John Harvard isn't actually John Harvard—or even, technically, the founder of the school.

Berthed at the Charlestown Navy Yard in Boston, "Old Ironsides" is the oldest commissioned warship still afloat.

This monument on Breed's Hill proves that one of the most famous battles of the Revolutionary War is misnamed.

The oldest Italian café in Boston, this spot also serves as a veritable museum of vintage coffee ephemera.

The colonial home of Paul Revere during the American Revolution.

The site where Charles Dickens gave his first public reading of "A Christmas Carol" in the US.

This bronze sculpture was inspired by a photograph of Martin Luther King Jr. and his wife embracing after he won the Nobel Peace Prize.

American revolutionaries and British soldiers alike are buried here in the fourth-ever cemetery in Boston.

Mrs. Mallard and her brood are a beloved fixture in Boston Public Garden.

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

Beautiful steampunk ghosts of early Massachusetts.

This historic hotel was once home to Henry David Thoreau and rumored to be haunted by ghosts of fallen soldiers from the American Revolution.

The Wright Tavern is possibly the most important building in Concord Massachusetts to the American Revolution.