By opening up the tunnels for guided historical tours, the company could educate visitors and locals alike on the history of the abandoned project. The conceptual plan also includes the ...

Cincinnati's never-utilized subway system is considered the nation's largest abandoned subway tunnel. For nearly ... sewer and suffered from a lack of maintenance and vision," reads the proposal.

Take the poll here "We need to lay out for ourselves and for the public to understand how we'll think about the future of this tunnel," he said. "The reality of having an abandoned subway tunnel ...

CINCINNATI (WKRC) - The city of Cincinnati is calling on residents to help determine the future of its long-abandoned subway tunnel ... costing millions in maintenance. Recently, city workers ...

The Rim of The World Historical Society in Lake Arrowhead gives tours of this abandoned tunnel for its members.” The Big Horn Mine in the San Gabriel Mountains boasts an impressive 7,000-plus ...

An curved arrow pointing right. Mobile laser scans reveal London's abandoned tunnels which were once used for The Post Office Railway. The tracks are 70 feet below the surface and were used to ...