Nine of the very few concrete ships ever made in the U.S. are beautifully decaying off a Virginia pier.

An FDR-era tuberculosis sanatorium has stood abandoned in the suburbs of the U.S. capital for over 30 years.

This Florida arena, once host to "the fastest game in the world," has sat empty for 25 years.

The ruins of a Florida miracle spring resort make it seem like a wonder that this was ever a health spa.

Despite being made of a seashell mortar, the crumbling remains of this historic Florida mill are still standing.

Once a place of peaceful repose, this sanitarium now faces an uncertain future.

The remains of a World War II munitions factory still haunt the fields of this Twin Cities suburb.

An abandoned early-20th-century boomtown sits within the Calico Rock city limits.

This overgrown Illinois water park offers a whole new type of adventure.

Collection of trolley cars in the woods represent one man's attempt to preserve transportation history.

The only runway directly into the magic kingdom has been closed since 1972, but it still sings to you if you drive fast enough.

This airfield is home to a number of retired vintage planes in various states of disrepair.

This road in the Great Smoky Mountains was supposed to assuage a displaced community, but ended up a $52 million dead end.

No one really knows how these old hobby horses got here, but the herd keeps growing.

This former theme park in New York's Adirondack Mountains fell into ruin before being resurrected as a state-run campground

A deteriorating 1990s Girl Scout camp in a beautiful lush park on Lake Ontario.

A planned settlement in Pennsylvania once housed the aristocratic refugees of the French Revolution.

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

This old cement mine has been used as everything from a mushroom farm to a recording studio.

This ghost town was once a cult-like religious utopian settlement.

An abandoned 1920s-era stretch of cabins now overshadowed by the 66 Motel.

This mining town boomed in the Atomic Age when uranium was gold, only to be abandoned when the industry collapsed.

Site of a famous 19th-century transcendentalist utopian community, now abandoned.

An abandoned asylum where patients have been forgotten but their possessions remain.