I'll second NY Biker that if you're interested/can make time, Versailles is definitely worth going to. The gardens are free during the week, but on summer weekends they charge admission for the "Musical Gardens". The last time I was there, I didn't know this and went on the weekend, and was grumpy about having to pay, but it was more than worth it. They have speakers hidden in the bushes/plantings around each fountain, playing 17th century chamber music, and the fountains are coordinated with the music. I though it would be really hokey, but it created this magical atmosphere that transported you back in time to when they really would have had musicians roaming the grounds to entertain the nobility. And the combination of music, water, and beautiful growing things was so restorative. It was a wonderful day, and that's how I'd re-experience the gardens if I had the chance.
I'll also put a plug in for Cinghiale Cycling Tours cinghiale.com They have a variety of tours in Italy, from super-relaxed to super-difficult. The people who run it are absolutely wonderful, and they seem to do well at keeping the azzhole quotient downI did one of their tours this summer, and have all of my fingers and toes crossed that my schedule will work to do it again (and if I could, I'd do each of their tours--they're all different, and all sound amazing).