Things To Do In Heathrow Airport to make your stay pleasurable. Discover the terminals and indulge in duty-free shopping for anything from designer clothing to British trinkets. At one of the many eateries serving international cuisines, treat yourself to a fantastic supper. Visit the art exhibits at the airport or unwind in one of the inviting lounges. To unwind, think about scheduling a spa appointment or having a cool shower. Utilise the free Wi-Fi to stay connected, finish your work, or just observe people. Consider using the easy Heathrow Express to get outdoors during a longer layover to local sights like Windsor Castle or the London city centre.