I had a not-so brief layover in London on the way back: about thirteen hours. After Sarah convinced me that I was too old to sleep in the airport, I booked a room near Heathrow. Expedia has a feature where you can get a lower price if you take a gamble on the actual name/location of the hotel. I went for it and landed a room in a Holiday Inn for $50.
The best part, or so it seemed, was that the hotel was less than two miles from the airport. "I’ll hoof it," I thought, particularly after seeing that there was a well-reviewed Indian restaurant along the way. (We don’t have Indian food in Potsdam.)
Well, after about two hours of taking shuttles, walking through subterranean tunnels, and trespassing alongside dangerous highways, I came to the conclusion that it is, in fact, impossible to exit Heathrow Airport on foot.
Dismayed, I paid for a hotel shuttle, took it partway, made the Indian food just before the kitchen closed, and walked the rest of the way to the Holiday Inn. The view out the peephole might not have been as impressive as the Capela de Carlos Alberto da Sardenha, but it was still pretty cool!