Venice. Always.
Monet’s Garden Giverny.
Fontainbleu (second largest chataeu in France after Versailles).
St Niklaas (to visit old friends)
Copenhagen - pretty cool place. 1 week is good, not in winter!
Lisbon - also a very cool place. Lots to do, and the timeout market is actually very good food, even though its on the lists, its worth it. My wife even said she preferred the tarts there, than at the famous tart shop in Belum.
Modena (make sure you book Osteria Francescana ahead of time) Modena itself is cute to walk around and explore.
Sydney - the harbour and Rocks area are touristy, but for good reason. Suggest trying to book Quay or one of our other 3 hat restaurants well in advance) plus you can visit me!
Tasmania (beautiful place, I fell into one of the famous waterfalls as a child)
Uluru (its expensive to get to, but pretty special)
Kyoto (those old castles and hilltop temples, plus really good bakery in the main station complex)
Harajuku (Tokyo) awesome gyoza place off the beaten track - very highly rated, but pretty traditional and fun.