In a northern part of Bavaria, which is called Fränkische Schweiz, you can find the so called Versturz Höhle Riesenburg.
It is located in the south of the community Wiesenttal-Doos, at the road to Gössweinstein. A short, steep trail is leading towards the arch.
It's dimensions: Span: 10,3 m; Hight: 10,0 m.
UTM coordinates: 32U 665279 5519302