Heathrow Airport. Aerial photograph looking west over Heathrow Airport in west London, UK, with runways, aircraft and terminal buildings at lower left. Terminals 1-3 are the main cluster of terminal buildings, with Terminal 5 at the western end of the airport. Two major motorways are the M4 at right, running east-west, and the M25 across centre, running north-south. The M4 and M25 junction is at centre right. The reservoirs at centre left include Wraysbury Reservoir and The Queen Mother Reservoir. London Heathrow (LHR) is one of the busiest airports in the world, with over 73 million passengers in 2014. Photographed on 19 February 2016.