Rezerwat Niebieskie Źródła, Niebieskie Źródła Nature Reserve

The Niebieskie Źródła Nature Reserve, or Blue Springs in English, is a nature reserve in Poland in the city of Tomaszów Mazowiecki. It is famous for two pools fed by an underground spring which seem to "shimmer" or "ripple" at the bottom due to the action of entering water. The reserve gets its name from the unusual colour of the water. Spring water absorbs red waves, hence the light, reflected from the bottom, has blue-green colour. ()