Lake Yamdrok, one of Tibet’s sacred lakes. The lake is remarkably blue, much like Crater Lake in Oregon, but for a different reason. Crater Lake’s blue is a result of its depth (1,000 feet below)– white light enters the deep waters and most frequencies (colors) are absorbed. Blue and violet escape, giving the lake a deep, rich, indigo color. Yamdrok is quite shallow, The lake is a dead salt lake — no rivers feed it — and it is considered to be the abode of certain protector deities.