A few days back MadamMtnLion commented about the logistics of providing water to all the plants in the gardens of Château de Villandry. It's actually pretty eco-friendly. They have a reservoir that fills up with water by natural means, and they reuse their water too. So providing water to the 150 000 plants really isn't the same troublesome deal here that it would be in other parts of the world where the climate is less forgiving.
The left picture shows the chateau as seen from a large pond that is situated in the highest part of the garden, and the right picture shows a beautiful set of steps that the water falls down though as it travels down towards the lower parts of grounds (on the other side of the bridge in the left shot). I like the curved pattern to it, it made it fun to compose pictures :)