Liverpool Street Station

Liverpool Street Station is one of the largest in London. It also has a subway station and train connections, including the Stansted Express which takes you to Stansted Airport in 45 minutes, from whence come the most Ryanair and Easyjet flights. Liverpool Street is northeast of the city of London and is the 2nd biggest station after Waterloo, with 123 million passengers/year! You can also go to Cambridge, Essex and several other interesting destinations. Sometimes there are offers (ask at the counter) for example after buying tickets for 2 people, the 3rd and 4th go free. But the train is so expensive that sometimes it's better to rent a car (especially if there are 4 of you).