The last large stand of primeval lowland forest in Europe, on the Belarus–Poland border — what the whole continent was before the clearances. A wild herd of bison grazes here, rebuilt from some fifty animals after the last free-living one was shot in 1921. The trees reach fifty metres and some of the oaks are older than the Commonwealth. Baltic and Slavic mythology filled such forests with leshys and wood-maidens, and the guides here are happy to keep that going.