A derelict bit of infrastructure from the canal that once ran through D.C. is landlocked in the heart of the city.

The little-known, 300-year history of the area includes former lives as a bustling tobacco port, parking lot, and industrial dump.

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

There’s a special club house at the top for the bell ringers.

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

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

A bit of retro transportation flair preserved in the world's largest department store.

Cryptic messages embedded in the New York City sidewalk.

The first purpose-built art gallery in the United States is once again open as a center of craft arts.

One of the dwarven trees dates back to 1625 and survived the Hiroshima bombing.

A popular European tradition makes its way to the states on one of America's most famous bridges.

Home to items never before seen by the public.

This bug-eyed water wheel uses the power of the Sun to clean up Baltimore Harbor.

Peek through the gates at this oasis from the city, full of Old English charm.

A semi-scholarly approach to sex.

This free, take-a-book shop seems like a trick but isn't.

Elevated freight railway turned wildly successful urban park.

A layered tribute to the work of mosaicist Isaiah Zagar.

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

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

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

These powerful, if squat, Canadian waterfalls flow in different directions depending on the time of day.

A book collector's dream, this Toronto bookstore has the world's first "Biblio-Mat," a random book vending machine.

"Girl in a Wetsuit" is what happens when a sculptor has to find a way around a 100 year old copyright.