ulmen, germany - 12 21 2021: floating advent wreath in caldera lake ulmener maar

town neighbourhood house street architecture road facade downtown city estate home building suburb tourism landmark infrastructure village ulmen small eifel next old ulmener maar located cstle ruin castle central place surrounded houses half-timbered look managed traditional attractive tourists germany 2021 main beautiful youngest caldera lake vulkaneifel volcano stone background church symbol ground floating advent wreach wreath sunset mirror calm