Postcard DE-3495274 was a nice greeting from Daun, Germany. It shows die Dauner Maare, a group of three volcanic lakes 2.5 km (1.6 mi) to 3.5 km (2.2 mi) southeast of Daun’s town center. The main town of Daun has only about 5,000 permanent residents. It is known as a spa town and the mineral water springs in the surrounding area, due to the volcanic geological features in the area. Daun is home to the Eifel-Vulkanmuseum, a museum dedicated to provide information about volcanic and other geological phenomena in Eifel and world wide, using interactive computer models to explain the exciting and complex geological processes including both physical and chemical processes.