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

This mosaic dedicated to John Lennon was tended for years by a Beatles super-fan.

This ruined fort hidden at the top of Central Park can't seem to keep from losing its historical plaques.

The fanciest public restroom in New York City boasts fresh flowers, art, and a classical music soundtrack.

A pedestrian island in the middle of world-famous Times Square emits a strange (and purposeful) humming noise.

Manhattan’s Battery Park has a whimsical carousel full of spinning, glowing fish.

Under a glass sidewalk lie the remains of some of Manhattan's oldest buildings.

These small stands sell Malian snacks to worshippers and passersby after Friday prayers in Harlem.

Once thought to be the fabled Holy Grail, it is now known to be an oil lamp.

During the 19th century, you could pay for violence off a prix fixe menu on this Manhattan street.

The very first subway station in New York City is beautiful, decked out in chandeliers, and ... abandoned?

This whimsical Oz-themed park had a wonderful impact on the surrounding neighborhood.

A strange and haunting monument of unknown origin in the historic Graceland Cemetery.

A haunting statue called "Eternal Silence" has quite the reputation among visitors with active imaginations.

This morbid, delightful curiosity shop offers everything from animal bones to human teeth.

These abandoned grain silos and tunnels are an urban exploration dream.

A hollow cement depiction of time's inexorable effect on the human body.

This alley in downtown Chicago held the bodies of over 600 people after the fateful Iroquois Theatre fire.

All of Chicago's wood-paved streets are long gone but two alleys remain.

An enormous park-like oasis, full of famous Chicagoans’ graves.

A giant bronze coil of feces is both a tribute to doggie defecation and a reminder to pick it up.

The subtle science of a master molecular gastronomist.

A small Chicago museum filled with thousands of preserved butterflies, beetles, and more.

A strange rock in Chicago marks the spot where a tree once stood in honor of the 18th President.