Morskie Oko, or Eye of the Sea in English, is the largest and fourth-deepest lake in the Tatra Mountains, in southern Poland. It is located deep within the Tatra National Park in the Rybi Potok (the Fish Brook) Valley, of the High Tatras mountain range at the base of the Mięguszowiecki Summits, in Lesser Poland Voivodeship. In 2014, The Wall Street Journal recognized the lake as one of the five most beautiful lakes in the world.