Imagine the biggest open flat space in an urban setting that you can imagine. Now multiply that by a factor of 10. That would put you somewhere on the tarmac or in the middle of one of the airstrips at Tempelhof Airport in Berlin.
The airport itself has some pretty fascinating history, but what is much more cool these days is to be able to walk onto the grounds and do pretty much whatever. My choice? Take photos and drink cheap vodka mixed with Fanta.
Win.