The recently created Diemer Forest is sandwiched between Amsterdam and the suburb of Diemen. When they started planting this forest in the early 1990s, hidden old tree trunks revealed to scientists that this polder must have been a forest many years ago as well. We will never know if the ancient ancestors of the Dutch enjoyed picnics at the tables here, or took leisurely strolls, bike rides, horse rides and walks through the swamp, but you can today!