One of the most famous islands in the city apart from museum island perhaps is Pfaueninsel or peacock island in Berlin Wannsee. Johann Kunckel had a glass foundry in the 1680ies and since he was also kinda pyromaniac the entire island burned down in 1689. After that it was abandoned for
another 100 years until Wilhelm the II the former emperor of the German Empire acquired the island and built his little Lustschloss, a very small palais on the island. Since then the island has become a very popular spot for tourists and of course couples from for a day trip from Berlin to enjoy the beyond romantic atmosphere and watch some peacocks and ponies on this very tiny island.