An eccentric inventor's castle home with its own indoor weather system.

Lie in a hammock where George Washington stood.

The twin towers in this Chicago fountain use 50 foot tall video screens to spit on people.

Four glass boxes hover over 1,000 feet in the air to give visitors an unparalleled view of Chicago.

World's first "penitentiary," meant to be humane, drove men insane.

Yo, Adrian!

America's most famous museum of medical oddities is home to the remains of Albert Einstein's brain.

A layered tribute to the work of mosaicist Isaiah Zagar.

Former villa and estate of James Deering developed to preserve native tropical forests.

An abandoned water sports stadium that has become a haven for graffiti and decay.

Japanese gardens dedicated to the Japanese farmer that refused to throw in the trowel.

The only swimming pool listed on the National Register of Historic Places is emptied and refilled each day with naturally filtered water.

A monument celebrating the idea of reaching inaccessible places.

The former home of the Nobel Prize-winning American writer is now home to dozens of six-toed cats.

These towering spires and glowing walls are carefully crafted from hundreds of thousands of icicles.

"the sweltering inhabitants of Charleston and New Orleans, of Madras and Bombay and Calcutta, drink at my well . . . The pure Walden water is mingled with the sacred water of the Ganges."

The world's largest piece of copyrighted artwork.

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

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.

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

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

Statue commemorating the use of ether in anesthesia.

The statue of John Harvard isn't actually John Harvard—or even, technically, the founder of the school.