Count Franz Erwein von Schönborn made the Riesenburg accessible by paths and stairs. This happened on the occasion of a visit of the Bavarian King Ludwig I, who visited the cave at the beginning of the 19th century. A king carved in the rock at the vantage point above the cave reminds of this visit:
"Following the wind-blow, the clouds come to the rock and give way, but the rock stands immutable in time."
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