Saturday we did a walking tour at Kinderdijke, the Nederlands.  It is designated a UNESCO world heritage site.  There are 19 windmills that were used to drain and claim land, basically peat in this area.  We were able to tour one completely.  As the breeze came, the canvases were opened on the blades.  Then the whole roof is turned to catch the wind power. Pretty ingenious workings.  The later mills were built of wood instead of brick and were octagonal instead of round to better distribute them weight.  As fascinating as all this engineering is, we left the tour and walked back to a shop torent