The trout farm in Złoty Potok is the oldest breeding farm in continental Europe. Ponds on the small river of Wiercica in the Kraków-Częstochowa Upland were built by Count Edward Raczyński, the owner of the estate in Złoty Potok. Engineer Michał Girdwoyń, the best then a specialist was commissioned to design the ponds’ arrangement. In 1881, the first ponds were stocked with trout brought in from California in the United States.