Kalja study trail (1 km)

Kalja study trail introduces karst forms and their causes. Waters that go underground in Kalja sinkholes run as a subterranean river and appear on the ground again near Jauni village, Hiieniidi (Iilasmaa) spring area, to the north of Kalja sinkholes.

A short 1 km loop by the Kihelkonna road on Saaremaa that explains karst. At the Kalja sinkholes a stream disappears into the ground and runs on as a secret underground river through the limestone, until its water rises again as springs to the north, near Jauni village in the Hiieniidi (Iilasmaa) spring area. The swallow holes are most impressive in spring when the snow melts and in autumn floods, when you can see and hear water pouring underground. The trail is marked in blue.