There is no such place (as of yet) that I despise, I want to travel everywhere and see new places, but there were times I felt that I felt I never want to go back there again. One such place is Kota, Rajasthan, India.
I spent grades 11 and 12 there, for preparing for all the prestigious engineering entrace exams of the country. What a joke. While I learned a lot and had both good as well as a bad time there (should be kind of obvious which weighed what), I don’t think I’ll ever want to go there.
And besides, I don’t want to visit a riot/war struck place either. Or somewhere where I might get mugged or killed.