Anonymous wrote:NOT France, and especially not Paris. Too many places will be shut for vacation, too many other tourists, and can be sweltering (not always, but not rarely either) but AC is limited.
Quick plug for France - while it is true that August is traditionally when most French families go on holiday, it's also the month that museums offer extended hours. There are fewer international tourists around Paris during that time, but more French families from other provinces. If you do some searches now for projected closures, and try to see if the restaurants you want to visit are open/or not, you can mitigate the guessing game once you are there. There's also several fun festivals put on at the time. Anyway, there are lots of good recommendations on here - have fun wherever you decide to go!