Wimsener Höhle
A water cave near Hayingen on the Swabian Jura and the only show cave in Germany that visitors tour by boat – but only for the first 70 m, where the ceiling dips to the water. Everything beyond can be explored only with diving gear; systematic exploration began in 1959 after divers passed a sump, and Jochen Hasenmayer later reached about 40 m depth. Research divers found Bronze Age pottery and human bones in a rear chamber. In 2023 the regional cave rescue service practised a cave-diving rescue here.
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