Three prestigious academic collections come together to create a world-class natural history museum.

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

The walkable ruins of an 19th century hotel, destroyed in a horse cremation gone wrong.

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

The site of one of the strangest disasters in history—a wave of deadly molasses traveling at 35 mph.

No one really knows how these old hobby horses got here, but the herd keeps growing.

Friction between grains of sand cause a curious "singing" sound.

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

Macabre headstones carved with winged skulls, dancing skeletons, and pithy reminders of impending death.

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

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

The Boston square dedicated to the dark poet who was born nearby.

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

This map, on display in the Library of Congress, and one of only seven known to exist, is the very first map of the United States.

Engraved in stone here are the signatures of everyone who signed the Declaration of Independence.

Ruins from the Parthenon and petrified wood line the interior of one of the world's most famous monuments.

The Lincoln Memorial has inspired many, even though a word on the inscription appears to be spelled incorrectly.

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

The 5.5-mile ring of steel posts around the Capitol Building is one of the largest (and most uniform) of its kind in the world.

This statue of the "father of television" stands prominently in the United States Capitol.

Disks are rolled out onto the south lawn to absorb the impact of Marine One's wheels like giant coffee coasters.

One of the three perfect vellum copies of this historic book known to exist is on display in a specially-designed case.

An echo chamber with a waterfall wrapped around its base at the Embassy of Canada in Washington, D.C.

An ear-piercing buzzer calls lawmakers to a vote with a series of long and short rings to form coded messages.