Photo - Heidenhöhlen
Johann Rudolf Rahn · Public Domain Mark 1.0, https://creativecommons.org/publicdomain/mark/1.0/ · Wikimedia Commons · https://commons.wikimedia.org/wiki/File:Zentralbibliothek_Z%C3%BCrich_-_Ausschnitt_der_Heidenh%C3%B6hlen_in_%C3%9Cberlingen_-_991063731919705501.jpg
Source: Wikidata – cave items (Germany) (www.wikidata.org), modified. CC0 1.0, https://creativecommons.org/publicdomain/zero/1.0/ Wikidata (CC0 1.0) · data as of 2026 · Source: German Wikipedia – article leads (cave descriptions) (de.wikipedia.org), modified. CC BY-SA 4.0, https://creativecommons.org/licenses/by-sa/4.0/ Wikipedia contributors (de.wikipedia.org), CC BY-SA 4.0 · Text by Wikipedia contributors (Heidenhöhlen (Goldbach)) · description · obtained 2026-11-13 · https://de.wikipedia.org/wiki/Heidenh%C3%B6hlen_(Goldbach) · data as of 2026