Coal

Sections of the iconic limestone columns have been left uncleaned as a reminder of the city's polluted past.

A memorial in coal country commemorates the victims of an all-too-preventable mining disaster.

Created as a coal reserve, it is today a natural park with stunning wildflowers, ancient marine fossils, and remnants of a 19th century mine.

No one knows the origin of this small town’s unique name.

Smack in the midst of coal country, this collection provides a peoples' history of Appalachian miners' heritage.

These abandoned coal mine towers near Sherwood Forest might soon boast the U.K.’s longest zip-line.

A ghost town that held steady longer than most, but finally gave up the ghost.

This hauntingly stark structure is a relic of an industrial past.

Germany has its very own Centralia, whose spark remains attributed to "spontaneous combustion."

A historic coal mine that doubles as a museum and tourist attraction.