Arkham Miskatonic Pedestrian Tunnel

The Miskatonic tunnel in Arkham is a pedestrian crossing below the Miskatonic river, constructed between 1894 and 1897, mainly as an access tunnel for the cities' sewage system which was also built at the same time.

The 82m (270ft) long tunnel has a diameter of 3m (10ft) and runs approximately 19m (63ft) below ground at its lowest point. Entrance to the tunnel is possible by two 6m (20ft) diameter vertical shafts at its ends. There is an additional access shaft at the tunnel midpoint below Wendigo Island that is also used for ventilation.

The tunnel is mainly used by students as a shortcut from the MTBA train station and bust terminal to the University campus on the south side of Arkham.