Tamula and Vagula lakes in Võru Vale are the remnants of the post-glacial large lake
http://fotoalbum.ee/photos/vaarikaemand/19544153

Evolved on the site of the ancient 120-m deep valley covered with glacial sediments

After the Glacial Era – a valley that carried away the meltwaters

On the deposited sands heath forests and paludifying forests

Clayey plains used as arable lands

Tamula and Vagula lakes are remnants of the late-glacial large meltwater lake

The biggest city: Võru – of unfavourable location in the sense of quite frequent floods (because of the small descent of the river)