A very famous site of course, everyone has probably seen it at one time or another without even realizing it. The part you don't realize until you get there? It's tucked into an absolutely gorgeous, picturesque valley, with a tiny village nestled and tucked next to it - all medieval.
The site itself is huge this place must have been exceptionally busy in it's day. Being Cistercian, the monks here ran this as a self-sustaining estate. So while I'm sure they spent a lot of time praying and what not - they were quite busy running the affairs of feeding hundreds of people.