London Heathrow Airport (IATA: LHR Airport) is a major international airport in west London, England. Heathrow is the busiest airport in the United Kingdom and the busiest airport in Europe by passenger traffic. Heathrow is also the third busiest airport in the world by total passenger traffic. In 2014, it handled a record 73.4 million passengers, a 1.4 percent increase from 2013. Via Wikipedia.
Heathrow Terminal Maps