Can we mention places we have already been to but have vowed never to return? If we can then I pick St Leonards-On-Sea in Hastings, East Sussex. I used to go to boarding school there and I went back a couple of years ago because my ex-girlfriend lives there and the place is now full of scum who would rob you blind to feed their drink and drugs habit. Plus my ex still lives there and she is toxic and more trouble than the thieves.