214.365
Quick trip to the Undergound Hoispital on the way back to work. Always good to get in here at least once a year. At first all the tunnels look the same but each chamber has developed its own characteristics over the time. The echos make it feel very eerie.
Canon EOS 70D - EF17-40mm f4L
17mm / ƒ/14 / 20s / ISO 100