This abandoned sea fort has become an accidental bird sanctuary.

Remnants of a storybook amusement park hidden behind a strip mall.

The remnants of a wooden-hulled fleet built and abandoned in WWI, now home to a thriving ecosystem.

This abandoned asylum was once a state of the art facility before devolving into one of the most deadly mental institutions in American history.

The ruins of this long-abandoned unsuccessful gold mine can still be found.

A remarkable time capsule of American manufacturing deep in Maryland coal country.

An astounding collection of medical specimens, including bits of President Lincoln.