Quackenschloss, passage cave, karst cave, geotope, natural monument, near Engelhardsberg, district of Markt Wiesenttal, Upper Franconia, Franconian Switzerland, Franconia, Bavaria, Germany, Europe

bavaria caves cave central europe deserted empty europe famous place franconian switzerland franconia franken fraenkische schweiz geotopes geotope german federal republic germany karst caves karst cave markt wiesenttal middle europe natural landmark natural monuments natural monument nobody no one no people oberfranken passage caves passage cave place of interest sights sight southern germany south germany sueddeutschland tourist attractions tourist attraction travel photography travel uninhabited upper franconia wiesenttal wiesent valley