Viljandi primeval valley

Author(s): Heiko Kruusi

The Viljandi primeval valley traverses in east–west direction through the entire Sakala Upland, splitting it into two. The width of the valley at Viljandi town is approximately a kilometre and the depth 30 metres. The Viljandi Lake at the valley bottom is a remnant of a former much larger water body (view from the Viljandi castle hills).