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

For over 80 years, Mayan ruins stood proudly in a most unlikely location.

Sacked by Vikings, blessed by William the Conqueror, dealt a fatal blow during the French Revolution—these ruins have seen it all.

Despite being burnt down multiple times, the ruins of this South Carolina church are still standing.

European castle ruins in an American state park are actually the product of death and grief.

The ruins of this Thomas-Jefferson-designed mansion have been left to crumble since the Christmas Day they burnt down.

The often-overlooked ruins of one of the first buildings designed by famous landscape architect Frederick Olmsted.

Once an ambitious nature spa, these forest ruins now provide a serene monument to failure.

The walkable ruins of an 19th century hotel, destroyed in a horse cremation gone wrong.

The ruins of this antebellum sugar plantation are the end result of a Seminole attack during the Florida Wars of 1836.

These beautiful ruins deep in the Pennsylvania woods are thought to have been a ski lodge or a speakeasy, but no one really knows.

Once adorning a New York skyscraper, these reclaimed ruins now haunt an Indiana park.

Ruins of a Carnegie family mansion on Cumberland Island.

100 years later, they're still down there.

A girls' boarding school inspired by the Chicago World's Fair, once abandoned, now restored to strange and scenic glory.

An Industrial Revolution-era public work that purified water using nothing but sand.

A historic cemetery filled with quirky faux wood art and unique tombstones.

Once the supplier for noteworthy projects like the National Cathedral, this old brickworks now lies abandoned.

WWII-era bunkers are hidden under the beaches of this picturesque park, which is still scattered with wartime watchtowers. .

An abandoned cemetery lies in ruins as the surrounding forest swallows it whole.

Arlington Cemetery exhibit dedicated to death and grieving.

North America's oldest quarantine facility was built in response to Philadelphia's 1793 yellow fever outbreak.

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

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