Thames River is the only geographical feature depicted on the London Underground Map. This is because there are many tunnels which pass underneath the Thames River such as the following: High Speed 1 which crosses from Swanscombe, Kent to West Thurroc Essex, Docklands Light Railway Tunnels and Woolwich foot tunnel which crosses from Woolwich to North Woolwich, London Underground Jubilee line Tunnels which cross from North Greenwich to Canning Town, Blackwall Tunnels which cross from North Greenwich to Blackwall, Greenwich Foot Tunnel which crosses from Milwall to Greenwich, Rotherhithe Tunnel which crosses from Rotherhithe to Limehouse, City and South London Railway Tunnels which cross from Borough to King William Street and London Underground Jubilee line tunnels which cross from Westminster to Waterloo.