aarburg castle fortress

aarburg aare aargau aged alpine architecture areburc beautiful bern blue bridge burg calm castle catholic chateau church city defensive destination dungeon dynasty europe exterior famous festung fortified fortress gothic habsburg heritage hill historic historical history houses landscape medieval mittelalter municipality museum national nature nice old outdoor outside picturesque reformed relic residence resort river rock roof royal scenery scenic schweiz shore significance site sky small spur style swiss switzerland tower town trees village water wiggertal