The London Underground is the world's first underground passenger railway, having opened in 1863. Its 11 lines move about 5 million passengers a day to 270 stations, along 400 km (250 mi) of track.

The massive network of London Underground stations makes up one of the most complex transportation systems in the world, and On the Underground challenges you to develop it. Build the most successful lines, connect them to landmarks, and attract passenger traffic!