照片 - Cova de l'Om
© Romang · CC BY 4.0, https://creativecommons.org/licenses/by/4.0/ · Wikimedia Commons · https://commons.wikimedia.org/wiki/File:Cova_de_l%27Om.jpg
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Petita cova que travessa la roca, Matadepera.
来源：Espeleoindex（espeleoindex.com），已修改。 CC BY-NC 4.0, https://creativecommons.org/licenses/by-nc/4.0/