Locals in central Iran just uncovered a vast underground city likely dating back centuries right underneath the remains of ...

Cincinnati asked architects and designers to submit ideas to repurpose the city's abandoned subway tunnel system. The Enquirer reviewed all proposals.

Explore the subterranean world of Seattle's past on a guided tour through the underground city's original sidewalks and ...

An underground labyrinth city and aqueduct were recently unearthed in the ancient town of Abarkuh in Yazd Province, Iran.