A Pythagorean funhouse that tries, successfully, to prove that math is the coolest thing ever.

The first museum in the United States dedicated entirely to posters.

A whimsical, but often overlooked clock in Park Avenue.

The façade of this building looks like a bingo board, but it's really a giant clock by a famed graphic designer.

A museum dedicated to antique toys, collectibles, and nostalgia.

These disused steel furnaces are now haunting ruins that may one day be a national park.

Once the most painted on object in the world, this short campus fence is well on its way to being so again.

The largest university building in the West is a gothic masterpiece containing dozens of theme rooms based on different countries.

There aren't too many operational funiculars around, but Pittsburgh has two!

The United States’s oldest funicular railway glides up and down a steep Pittsburgh street.

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

A hidden "place of interment for gentlemen."

A parade of antique steeds offers a quirky ride through history.

A seasonal movie monster museum featuring wax creations by a relative of one of the original Universal Studios monsters.

Historic funicular railway, believed to be the shortest railroad in the world.

A faux European lane smack dab in downtown L.A.

The so-called "Bridge of Thighs" in Palm Springs allows nudists to discreetly cross the road.

An odd, ancient window that may have once been part of a brutal prison is embedded in the side of New York's Police Plaza.

A tree that grows parallel to the ground was declared Brooklyn's "crowning curio" by the poet who saved it.

You can still ride this 100-year-old work of art in Brooklyn's largest public park.

The longest continuous underwater road in North America was built at the insistence of Franklin Roosevelt.

Stunningly detailed mosaics in a New York subway station bring life to the Weimaraners of artist William Wegman's work—and to thousands of commutes.

Ride the subways of yesteryear.

An artist's cute bronze subway sculptures belie his violent artistic past.