Today we got another late start due to fog. Once the fog burned off we had wonderful (but cold) weather for our excursion. We started by traveling through three of the 17th century drained lakes in the area just north of Amsterdam. We visited a windmill museum in Schermerhoorn. We then took a look at two large sea walls. First we drove along the West Frisian Sea dike first constructed in the 12th century. We followed that with a trip to the Hondsbossche Zeewering a large modern sea defense.