|Directions to Crystal City Underground Complex Take 55 South to Exit 175 (Highway A) and make a left.
Go to 61/67 and make a left.
At the 2nd light (Bailey Road) make a right
Go to Mississippi Avenue and make a right
Follow fence line on your left until you come to an opening in the fence where there is a sign for Crystal City Underground. Turn into the opening of the fence and follow the road until you come to a bridge. Cross over the bridge (this bridge has been certified by an engineer) and go through the tunnel until you come out of the tunnel.