In Amsterdam there is a spot called The Dam. It is not a dam, it is a statue in a square behind the Palace. The square is teeming with pigeons and tourists feeding the pigeons. It is a competition of sorts across the square: attract as many pigeons as possible and then run through them all the while your friend records it. Needless to say, it is quite unnerving to stand in the middle of it all, pigeons swooping by, threatening to hit you in the head with their wings.
It is a The Birds-esque nightmare. I highly recommend it, it is quite a sight to see.