South Philadelphia is home to Keith Haring's only surviving in situ collaborative public mural.

These hooded graves are the only of their kind in the United States.

This extraordinary Depression-era expenditure was modeled after a postcard of a Mediterranean hotel.

This semi-spooky remnant of an abandoned hotel provides fantastic views.

The only geyser in the state of Pennsylvania is caused by pressure from an abandoned coal mine outside of the ghost town Centralia.

Lady Liberty's first beacon of enlightenment is now displayed in a museum near the statue.

A beautiful and abandoned New York subway station from 1904, complete with chandelier.

In all of the 29 years it was in operation, no prisoners ever escaped successfully... or so they claim.

A local prank turned town icon.

A failed piece of Orientalism has become the proud symbol of a community.

When the Austin Dam failed it destroyed much of Austin...and then it failed again.

A mine fire has been burning under the deserted town since 1962, but this church is still going strong.

Sail through this subterranean show cave that is home to a legend that would go on to name nearly everything around it.