Monticello Garden Virtual Tour
Gardening.About.Com has a link to this excellent site about the gardens of Monticello, Thomas Jefferson's home in Charlottesville, Virginia.
We visited the home many years ago when we were in Maryland for a friends wedding. The gardens are indeed quite amazing. I highly recommnd a visit for anyone who might be in the area. You can also visit Ash Lawn-Highland, the nearby home of James Monroe and Montpelier, the home of James and Dolly Madison, a little further up the road towards Fredricksburg.