Photo - Iberger Tropfsteinhöhle
© Siegbert Brey · CC BY-SA 4.0, https://creativecommons.org/licenses/by-sa/4.0/ · Wikimedia Commons · https://commons.wikimedia.org/wiki/File:Iberger_Tropfsteinhoehle.jpg
Source: Geotope Niedersachsen (Landesamt für Bergbau, Energie und Geologie, LBEG) (nibis.lbeg.de), modified. LicenseRef-LBEG-no-licence-stated Landesamt für Bergbau, Energie und Geologie (LBEG), NIBIS Kartenserver · data as of 2026 · Contains information from Grottocenter (Wikicaves), grottocenter.org, made available under the Open Database License (ODbL 1.0, https://opendatacommons.org/licenses/odbl/1-0/), modified. · length · obtained 2026-11-13 · https://grottocenter.org/ui/entrances/23594 · data as of 2026 · Contains information from © OpenStreetMap contributors, www.openstreetmap.org, made available under the Open Database License (ODbL 1.0, https://opendatacommons.org/licenses/odbl/1-0/), modified. · https://www.openstreetmap.org/node/3213191649 · data as of 2026 · The derived data is available on request under the ODbL: [email protected]