Baltimore Harbor Tunnel, Maryland
The Baltimore Harbor Tunnel is a genius method of transportation that allows people to drive through the Patapsco River. This is a pair of two-lane tunnels located about 50-100 feet underground and caters to local and interstate traffic. On one morning, floodwater gushed into the tunnel, terrifying drivers and causing massive confusion. Some drivers attempted to continue driving despite the water, but thankfully, no one was injured. This flooding was the result of a construction test, and water pumps located in the tunnels quickly cleared things up and allowed traffic to progress smoothly again.