Mt Damavand Pool
The crater pool/lake is frozen most of the time, only in a very hot summer you may see a little water in the crater, it`s rank is 9 in the World Highest Lake Ranking .

The volcano Damavand in northern Iran has a small lake in its summit crater during the summer. This one sounds remarkably similar to "Lake Licancábur".
The summit crater is about 150 m wide and 20 m deep, with a 40-m diameter frozen lake in the bottom. Although the summit rises to 5,670 m above sea level, there is no permanent glacier because of the dry climate.Therefore "Damavand Pool" is at 5,650 meters above sea level.
It appears that Damavand Pool cannot qualify as a true lake because it's too small, and because it disappears during the winter. It's not clear if the pool vanishes during the winter because it evaporates completely, sinks into the soil, or because it freezes solid down to the bottom.
In 1881 the summit crater had no lake, only snow: This is what Mr. Stack, in 1881, had to say of the view: 'From the summit which consists of a crater with snow and ice, a horizon of 50,000 square miles is unrolled in clear weather. The crater is some 200 yards in diameter, girt with a ring of yellow rocks of nearly pure sulfur, exhaling a pestiferous smell. The hollow is entirely filled up with snow.The Highest Lake in the World

1- Lhagba Pool - 6368m - 20892f - Tibet
2- Changtse Pool - 6216m - 20394f - Tibet
3- East Rongbuk Pool - 6100m - 20013f - Tibet
4- Acamarachi Pool - 5950m - 19520f - Chile
5- Lake Licancábur - 5916m - 19410f - Chile-Bolivia
6- Aguas Calientes Pool - 5831m - 19130f - Chile
7- Ridonglabo Lake - 5801m - 19032f - Tibet
8- Poquentica Lake - 5750m - 18865f - Chile-Bolivia
9- Damavand Pool - 5650m - 18536f - Iran
10-Karda Lake - 5643m - 18513f - Tibet

Mount Damavand Pool 5650 m 18,536 ft

What a pity the beautiful Mount / Volcano Sabalan Lake 4800m in Azarbaeijan Iran ,is missing in The Highest Lake in the World ranking ?!