@vonny,
This medieval looking bridge, "Rakotzbrücke", dates back to the late 1860's. And it's a bridge just "for viewing" = you can't use it. (This is the reason, why it's locally called "devil's bridge".)
I posted one or two pics some time ago here.
The interesting fact about this bridge is its high canopy and reflection in the water of the river Rakotzsee, creating a full circle.