A NETWORK of abandoned underground tunnels have been transformed and reopened to the public. The Tregarth Railway Tunnels in Wales were once part of a passenger railway line. And they have now ...
At roughly $4 billion, it's the largest transportation project in state history. Previous coverage: Mary, the tunnel-boring machine, starts work again on the HRBT Expansion Project Mary ...
But it climbed over 300 feet from its junction with the North Wales main line at Bangor and required two viaducts and two tunnels to navigate rivers and hillsides. Messrs Thomas Nelson & Co of ...
A 9.6-mile-long underground tunnel in Africa is nothing less than a construction marvel. Built at a cost of a whopping £2.6 billion ( $3.3 billion approximately), the Gautrain rail tunnel is ...