Two geological phenomena in one precarious locale: a towering stone window, and a deep blue void.

The fishing boats that moor in this small lagoon enter and leave through a tunnel to the sea.

This spectacular dome managed to survive after being bombed in World War II, in an event known as the "Miracle of Mosta."

This life-size replica of the Statue of Liberty's flame is also a tribute to Princess Diana by default.

This Manhattan skyscraper is a reminder of the brief but glorious age of urban air taxis.

The first piece of public art dedicated to LGBT rights.

A dark patch of the ceiling at Grand Central Terminal which was not restored is still stained brown by tobacco.

There must be a pun in this haystack somewhere...

Unrepaired walls from a 1920 anarchist bomb attack.

The oldest living tree in Manhattan comes shrouded in sinister legend.

The New York hotel where tragic visionary Nikola Tesla spent his final hours, destitute and alone but for the pigeons.

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

Spinning silently in the lobby of an Art Deco masterwork is a massive vintage model of the Earth.

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

A celebration of capitalism in Midtown.

This unmarked and unloved Manhattan subway grate created one of the most iconic images in American cinema.

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

A semi-scholarly approach to sex.

A miniature rainforest is growing inside of a Midtown Manhattan office building.

Elevated freight railway turned wildly successful urban park.

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

Brussels' favorite peeing boy has a sister.

The site where one of the most famous poems of World War I was composed is preserved to honor the legacy of the work.

A little sculpture with a large wardrobe.