Tar Tunnel 
Description
Originally built to create an underground canal to link the coal fields on Blists hill to the River Severn during it's construction the miners hit a well of natural bitumen which still oozes from the walls of the tunnel. The idea of a canal was quickly abandoned (replaced by the next door impressive inclined plane) and the bitumen was extracted for a number of years.
Charge
Charge, Part of the Ironbridge Passport
Getting There
Latitude: 52.619986; Longitude: -2.452912
What3Words: enclosing.highbrow.dimension
