The oldest continuously operating fish market in the United States.

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.

Rumor has it the uncarved lump behind the three famous suffragists is reserved for the first woman president.

A little marble compass above George Washington's (empty) tomb in the Capitol marks where D.C.'s four quadrants intersect.

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

Corn-inthian columns with a uniquely American take on neoclassical architecture.

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

A men’s restroom became a sandwich shop.

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

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

The site of Paul Revere's historic two lantern warning.

A former waterfront market is now in the center of town due to some interesting Boston engineering.

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

This statue intended for children to enjoy became a minor political spat.

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

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

This isn't your average roadway—it's actually a National Park and a transportation pioneer.

A derelict bit of transportation infrastructure hidden in the woods.

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

A sign at the end of the Santa Monica Pier marks the traditional end of the legendary American highway.

Members of Congress have traveled between the buildings on Capitol Hill for a century hidden from tourists, press, and storm clouds.

Washington's iconic carousel has a nice piece of Civil Rights history.

The actual model from the original "Star Trek" series is now on display at the National Air and Space Museum.

The "lovely red Vega" of the legendary record-settling pilot.