This block in downtown Brooklyn was a hotbed of antislavery activism along the Underground Railroad.

A modern zoetrope on the New York City subway.

This impressive mansion in Vinegar Hill has some mysterious details in its architecture.

Abandoned 19th century homes once occupied by naval officers, soon to be demolished.

Walk into the 19th century without leaving Brooklyn.

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.

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

A suburban street in Anchorage doubles as a runway, and each home has its own airplane hangar.

Colorful boxes placed over the dead are left to rot and crumble.

A high school astronomy enthusiast designed this model of our solar system to be traversed on foot.

Surprisingly aquamarine waters fill deep lakes formed at the end of the last ice age.

Abandoned rock quarry now a haven for mountain bikers and hikers.

A Frankenstein blend of science and art allows one tree to produce 40 different types of stone fruit.

A reversed traffic signal that was once violently misinterpreted as a statement on British-Irish relations.

This Art Deco fortress in upstate New York gives Manhattan's vaunted examples of the style a run for their money.

Sniff the Titan Arum's rotting flesh.