Manchester UK without a doubt. There's a pub right at the end of the runway called The Airport Hotel, but they have to be taking off on 24R for you to get the best experience. As the 747's turn and line up for take off, you get a blast from the engines, it's great!
One morning, last year, I got there really early and a 747 was taxiing for take off. As it turned to line up, it must've been heavy because I got a great blast of hot air (great coz it was a cold morning) and all the bins went flying...lol.
Just a shame they use 24L most of the time for take offs. Although, (not sure if this is still happening) they used to close runway 24L between 12 and 3 in the afternoon...heaven!
If they're not taking off on 24R then I'd say the spotting park at the other end of the runway.
Like LBA, I have yet to visit the new park, but hopefully, it will be as good as the old one.