Morskie Oko (Eye of the Sea) is the largest and fourth deepest lake in the Tatra Mountains. It is located deep within the Tatra National Park, Poland, in the Rybi Potok Valley, at the base of the Mięguszowiecki Summits, in Lesser Poland Voivodeship. Morskie Oko has been recognized by the journalists of The Wall Street Journal as one of the five most beautiful lakes in the World.