Elevated freight railway turned wildly successful urban park.

What was once a true peninsula has now been filled in, causing the water to recede and leaving many streetside "waterfronts" and landlocked "islands."

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

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

Now a museum, this building was once a 14th-century monastery and the place where the founder of the Dutch nation lived and was assassinated.

The world's first and only three-segment bascule bridge folds up into the shape of a capital "N" to let boat traffic through.

This historic abandoned train station looks like a stop for ghost trains.

This eye-catching roundabout sculpture commemorates one of England's best World War II-era "shadow factories."

An extraordinary library and archive dedicated to the history of the Arctic and Antarctic poles.

A treasure trove of astronomical, mathematical, and scientific instruments at Cambridge University.

The Cambridge pub where Francis Crick announced that he and James Watson had discovered the DNA double-helix.

Numberless clock creates a meal of time for the dreaded, insectile Chronophage.

The peaceful space is adorned by paintings by the famed abstract artist Mark Rothko.

There is an unmarked red button hidden over Houston's Buffalo Bayou that is just begging to pushed...

A private collection of massive steel monsters guarding a Texas pipe works.

The farm where one of America's greatest leaders was raised is now a well-appointed landmark.

Less a museum than a bizarre fantasy world created by artists and engineers.

Colorful curls of hand-blown glass form a captivating tower in San Antonio's Central Library.

Home to the largest urban bat colony in North America, estimated at 1.5 million bats.

The upstairs reading room is packed with millions of rare books, literary manuscripts, and historical treasures.

This awkward aquarium sculpture is one of the strangest statues in Chicago.

This Delaware River bridge is emblazoned with a catty slogan from a more prosperous time.

This stone tower marks a lookout point over the historic Washington Crossing, and maybe some buried treasure.

Yo, Adrian!