This charming colonial alleyway is one of the oldest continuously used residential streets in the U.S.

The taxidermied remains of Charles Dickens' pet raven, which helped inspire one of Edgar Allan Poe's most famous poems.

A tour de force of a fountain, memorializing a man who loved fountains more than anything else.

Yo, Adrian!

This elaborate towering structure was once famed for its revolutionary height.

Mural made of 100,000 pieces of hand blown glass, and one of the largest glass murals in the US.

A clone-tree in Washington Square Park sprung from seeds that went to the Moon and back.

One lonely, modern pyramid has gone from corporate think tank to deserted boondoggle.

The enchanting archway is the only surviving portal into Dublin’s lost medieval wall.

The "lost friend” is the most famous of the six moai statues that were removed from Easter Island.

One part antique store, one part curiosities hodge-podge.

This unique structure in suburban Austin is made up entirely of other people's castaways, and constantly changing.

A grove of colossal man-made flowers built to collect the sun's rays.

Locals dubbed it the "Owl Building" because of its bird-like appearance.

Turning night into day in Victorian-era Austin to thwart a serial killer.

Austin’s nonprofit-run graffiti park where street art is meant to be painted over.

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

This plaque marks the spot where the first crossing guards helped get kids safely to school.

A unique botanical garden housed in three giant geodesic domes.

The 28-foot granite map plots the locations of 40 theaters in New York City.

Gambling, boozing, and yodeling animals cover the walls of this dive bar cum natural history museum.

This kaleidoscopic mural shows Bob Dylan throughout his transition from young troubadour to Nobel laureate.

Oversized statues are just the tip of this nostalgic Americana roadside attraction.

Illegal drag racing two stories beneath Chicago’s streets.