Manhattan's Thirteenth Avenue was made on landfill then deliberately destroyed — apart from one small, obscure block.

Elevated freight railway turned wildly successful urban park.

In the town of Třeboň, carp is king.

600 stumps, branches, and trunks of different shapes and sizes.

This network of conjoined cellars was riddled with traps and supposedly allowed the townspeople to pretend their homes were deserted.

Hundreds of lucky felines haunt the ruins where Caesar was murdered.

Ninety feet off the valley floor is an ancient dwelling put under protection of the U.S. government by Teddy Roosevelt.

A museum dedicated to the exploring past, present, and future innovations.

No one's quite sure where this quirky university tradition originated.

This iconic water tower and failed bandstand is open for panoramic views once a year.

This unusual subway stop was originally a real estate office.

This innocent-looking townhome is actually a subway exit.

A whimsical, punny collection of "fence art" outside the tiny mountain town of Baker, Nevada.

This crumbling stump is all that remains of what was once thought to be the oldest living organism.

The longest living non-clonal organisms on Earth.

The abandoned zoo enclosures offer a perfect place to experience the other side of the bars.

A motel dedicated to Southwestern nostalgia.

A walk-in working camera obscura produces 360-degree live images of the San Francisco coast.

Relics of the 1894 Midwinter Exposition continue to delight visitors today.

In all of the 29 years it was in operation, no prisoners ever escaped successfully... or so they claim.

A trash dump made beautiful by nature's power.

A museum within a museum, devoted to history's most questionable medical devices.

World's largest carved onyx figure stands as a tribute to enduring peace.

The Real LegoLand.