An Original Polish Bison Grass Vodka. Zubrowka goes back to the 14th Century when Polish alchemists first discovered how to distil vodka. Bison Grass only grows in the Bialowieza Forest in Poland. Today the forest is protected by the United Nations, the secrets of finding Bison Grass is only known to 21 families in the area. It has gone on to become one of the best selling Polish vodkas around.