The Triglav Lakes Valley (Slovene: Dolina Triglavskih jezer) is a rocky hanging valley in the Julian Alps in Slovenia, below the sheer sides of mountains Tičarica and Zelnarica to the southwest of Triglav. It is above the tree line and is geologically Alpine Karst - therefore it is also called the sea of stone.

In contrast to common belief there are ten and not seven lakes in the valley. The lowest lying lake is Črno jezero (the Black Lake) at an altitude of 1294 m above sea level - it is positioned above the rocky slope of Komarča. The Alpine Newt (Triturus alpestris lacusnigri, Slovenian: Planinski pupek), endemic to the Alps, lives in it. Below Tičarica (altitude 1676 m) there are two interconnected lakes known as Dvojno jezero (the Double Lake). At the height of 1838 m lies Veliko jezero or Jezero v Ledvici (the Great Lake or Lake at Ledvica). This is the largest and the deepest of these lakes. The highest is Jezero v Podstenju (the Lake at Podstenje), which is located at an altitude of 1993 metres.