I would say the "big 3" (London, NYC, Paris), Rome, and Barcelona

And not to mention, most tourists there don't even experience the actual charms of the respective cities. Times Square is the biggest tourist trap in the U.S., people go to the Eiffel Tower and Notre Dame and say "Paris is so great!"
Also, Dubai. What an abomination to Planet Earth

Building ugly buildings just for show, wasting exorbitant amounts of water
