Allikasoo study trail (2,5 km)

Estonia’s most well-known and extensive spring fens are located in Viidumäe, at the foot of the Lääne-Saaremaa Upland.

Viidumäe holds Estonia's best-known spring fens, and this 2.5 km loop takes you down to them. A staircase descends the nearly 18-metre bank left by the ancient Ancylus Lake, then boardwalks cross strips of fen lying between the beach ridges of the later Littorina Sea. From the platforms you see springs where dissolved lime settles out as soft tufa, a rare process to watch. The fen flora is rich; the Saaremaa yellow rattle grows here and nowhere else in the world. The trail starts and ends at the Viidumäe car park and is marked in yellow.