This massive airport is the world's busiest international airport, and is regarded as the hub of the aviation world; over 90 airlines have made the London Heathrow Airport their base. Vast and sprawling, it can take some time to get between the different terminals, so be sure to know exactly where you're going before you get there. There are cash machines, bureau de change facilities and post offices throughout. Valets, car rental stalls, taxis and buses all operate out of the many terminals. There's also a vast array of food outlets, ranging from burger bars and coffee houses to sandwich shops and sit-down restaurants. For further information, check website or call +0870 000 0123.