The oldest building in the District of Columbia was preserved because of a mistaken connection to George Washington.

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.

A men’s restroom became a sandwich shop.

This massive tea kettle was once a promotional stunt for the Oriental Teashop.

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

D.C.'s first central library was born out of a chance encounter with the philanthropist whose name it bears.

An obscure public service from the U.S. government that redeems burnt, moldy, and soiled old greenbacks.

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

Ice cream stand, snack bar, and time capsule of milk conveyance.

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

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

Government testing at the asylum briefly explored using marijuana as a "truth serum" on Nazi prisoners of war.

This stunning blue and gold room changed cities twice before becoming part of the Smithsonian.

The Byzantine, pre-Columbian, and medieval art at this stately mansion are some of the most under-appreciated collections in D.C.

The country's oldest continually-operated mini golf course lies hidden in plain sight, eclipsed by one of D.C.'s most popular tourist attractions.

This bird-loving brewery is situated in an old municipal bathhouse, nestled beside a 300-year-old windmill.

This city square is home to Amsterdam's oldest church and a statue honoring Dutch sex workers.

Old ships and machinery fill a historic harbor in the city that's home to Europe's largest port.

These slanted cubic abodes are a creative if odd solution to a zoning pickle.

This iconic 1958 tower welcomes air travelers to Tucson with neon-lit letters and architectural style.

The world's largest military aircraft cemetery.

This cheese shop also houses a museum devoted to Dutch dairy.

One of the oldest Mexican restaurants in the United States air-dries its trademark beef in a dangling outdoor cage.