Tunnel Vision

Carnegie's Brae. 
On the left is the famous Tunnels night club.
This is a really old road, and over a couple of hundred years ago it would not have been underground. But at the end of the 18th century, beginning if 19th century, the city council made the city bankrupt by constructing Union Street, and the viaduct, of which this is part of.
It used to be open to traffic, but now is for pedestrians only. it has wall art all over both sides of it.