I'd love to visit Lothlórien, especially if I could take a few plants of niphredil back with me (I've been trying for nigh on two years to find a plant that fits my mental image of niphredil, and I'm failing miserably

). Ithilien, of course; I'd probably have my home there (maybe in the same area where the Elves from Eryn Lasgalen lived?), with a summer cottage in Rohan. From the gushing description Gimli gave Legolas, I'd definitely want to visit the Glittering Caves. And the Derndingle where the Entmoot was held sounds like a nice place for a picnic.
To be honest, I'd like to visit every place in Middle-earth, even Mordor to an extent (well, maybe not the Midgewater Marshes...

). It all sounds more interesting than where I live.