One of the most beautiful gardens I have seen is in Monet’s Flower Garden in Giverny, which is about forty minutes outside of Paris. First of all, I would highly recommend that you make a day at of it. You will not be disappointed.
The museum itself is amazing and the gardens are simply wonderful. The lilies and other plants living in the numerous ponds are breathtaking and no picture you have seen of the gardens compares to seeing things with your own eyes.
I suggest that you tour the gardens and then do lunch in one of the restaurants and if you have time stroll around the town.
To me, this is a must visit destination.