This seemingly out-of-place gas station by the Watergate hotel was once described as the most expensive gas station in the world.

This imposing Masonic temple a mile from the White House was the first public library in Washington, D.C.

A rotating cast of guys and dolls in front of a Washington, D.C. building.

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

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.

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

This statue honors the author's groundbreaking family story.

The historic home still shows the scars from a little run-in with the British in 1813.

A 60-room castle constructed by a horse-racing heir.

This Rhode Island mansion was a stand-in for the exteriors of Collinwood in the original "Dark Shadows" series.

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

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

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

An interesting decoration on this historic site, this weathervane comes with as many legends as it does questions.

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.

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

This delicate museum is devoted to the art and industry that once supported Cape Cod's oldest town.

Centuries-old hoofprints and wagon tracks reveal themselves after a good winter storm.

A playground inspired by differential calculus dangles from the ceiling of the Liberty Science Center.

This elaborate High Victorian Gothic structure is one of the world's few 16-sided buildings.

The sweetest graveyard in the world is filled with headstones for dearly de-pinted ice cream flavors.

Every year, the colorful murals of Montreal get a complete makeover.

Montreal's colorful subway station shows its support of the local LGBT+ community.