paul Moderator Mar 1, 2021 #1 The Longest Underwater Cave in Sweden https://www.outsideonline.com/2420992/dolinsj%C3%B6-cave-expedition-bjur%C3%A4lven-sweden?utm_campaign=rss&utm_source=feedly&utm_medium=xmlfeed
The Longest Underwater Cave in Sweden https://www.outsideonline.com/2420992/dolinsj%C3%B6-cave-expedition-bjur%C3%A4lven-sweden?utm_campaign=rss&utm_source=feedly&utm_medium=xmlfeed
Graigwen Well-known member Mar 1, 2021 #2 Lovely underwater scalloping. See also https://expeditionbjuralven.se/the-cave/ .