north portal of the 442-yard-long Sherwood Tunnel. This portal has been covered with earth. The south portal of this tunnel has also been covered with earth and is just to the west of The Wells Road, Nottingham. To the south of this portal is the St. Ann's Well Station House, which is used as a residence. The station house is on the corner of Dooland Drive and The Wells Road. Sneinton Tunnel is 128 yards long and the furthest south of the four tunnels. Its north portal is still visible, but bricked up with access through a locked door. This tunnel was once home to a rifle club. This portal is found at the south end of Porchester Road on the opposite side of Carlton Road, Nottingham. Thorneywood Tunnel is a 408-yard-long tunnel south of Sherwood Tunnel with its north portal in a short cutting off Mickleborough Avenue, Nottingham. This portal has also been covered with earth. There was once an embankment to the north of this tunnel leading first over two brick arches and then on to a high girder bridge. The bridge was removed in 1954 and the embankment was removed in 1959. The rubble from the embankment was packed into Thorneywood Tunnel. Fifth Tunnel. There was a fifth tunnel on the Nottingham Suburban Railway. This tunnel was on a branch line serving the Nottingham Patent Brickworks. It was 118 yards long and ran from Thorneywood Station under Thorneywood Lane. There was a steep gradient uphill from the station; therefore wagons were hauled through this tunnel to the brickworks by a stationary engine. Park Tunnel The Park Tunnel was built in 1855 to allow horsedrawn carriages access to The Park Estate from Derby Road in Nottingham. This area was formerly a private hunting park for the Duke of Newcastle, who was also the owner of Nottingham Castle Mansion. The Fifth Duke of Newcastle retained architect Thomas Chambers (T.C.) Hine (1813–1899) to design and build the Park Tunnel (primarily as the main entrance to the park) and to develop the park as a residential area in central Nottingham for the wealthier members of society. T.C. Hine was also made responsible for the later repair of Nottingham Castle and its conversion into a museum. The tunnel is still in use, providing pedestrian access from Derby Road, Upper College Street and The Ropewalk to the Park. See also Caves of Nottingham