Kromlech definition says, that it is a circle made of stones with ritual purposes. The most known kromlech is in Great Britain and it's called Stonehenge. In Poland there are 4 such stone circles: In Odry, Grzybnica, Wesiory and in Grzybownik.

Polish kromlechs were built probably by the Nordic tribes in the past.  Such tribes were wondering through the territory of Poland in search of better life. Kromlechs in Poland are worth to see, because their are the biggest one in Eastern Europe.

All Polish stone circles can be seen here, on AngloPolish. Their history can be read on Wikipedia.