We also gave students a tour of Kinderdijk, a UNESCO heritage site. According to the site Kinderdijk.com : “A significant part of Holland is situated up to approximately 7 meters below sea level. The Dutch don’t notice any of this though, because an incredibly innovative and intricate system keeps the ever-rising seawater from flooding the land. Even during spring tide, the Dutch are safely guarded from being washed away… The most important aspect of UNESCO World Heritage Kinderdijk is undoubtedly the unique collection of 19 authentic windmills, which are considered a Dutch icon throughout the entire world. A wonderful and unforgettable day trip in the Netherlands for the entire family!”