The feral felines of Roosevelt Island have a small army of allies and an abandoned hospital all to themselves.

Every autumn, this hillside is ablaze with red summer cypress.

The largest ancient burial mound in Ohio.

Beijing's version of Disneyland, completely abandoned, mostly destroyed.

The longest hedge maze in the world.

Sparkling, calcite-covered skeletons of children who may have been sacrificed to appease an angry god.

A miscalculation turns a very shallow freshwater lake into a very deep saltwater lake.

The original "capsule building" is a masterpiece of Metabolist architecture.

An enormous concrete structure built over a nuclear crater.

Celebrated as a center of civilization, the remains of the ancient city have been nearly destroyed by greed, egoism, and war.

A mysterious chasm in the heart of the ancient Roman Forum, the Lacus Curtius was once believed to be a gateway to hell.

A cave network located at the southernmost tip of mainland Greece was once believed to be an entrance to Hades.

Hellam Township is reputed to feature seven remote gates, which when passed through in the right order, open an entrance to hell.

They squeal, they nosh, they look like predators.