Tsalka Reservoir - the biggest reservoir in Georgia, located in Tsalka Municipality, at an altitude of 1506 m above sea level, in the gorge of the river Khrami. It is streched from the west to the east. Most of the shores are low and steep, on the south-eastern part of the shore - steep and high. It takes water from Khrami and other small rivers, as well as groundwater, snow and rain. It designed with a concrete dam in a narrow and deep valley, for energy purposes in 1946. It is seasonally regulated. An ice cover is created on the reservoir from December to the end of March. The river Ktsia-Khrami flows into the reservoir.

Paravani is the biggest lake in Georgia. It is located 2000 metres above sea level. Besides it is an amazing place for photography and birdwatching, the lake has it's mystery: however the lake is relatively shallow, the water in the lake is always muddy. In winter, the surface is covered with a thick layer of ice. For this reason, the mystery of Lake Paravani remained undiscovered. The secret was accidentally discovered by divers. According to them, there is a huge object under the lake, the size of which is about thirty metres. Geophysical studies have shown that there is indeed an ancient structure at the bottom of the lake, covering almost a thousand square metres. A scientific expedition was created to investigate this object. The results surprised the scientists. It was found that there is a Bronze Age tomb at the bottom of the Paravani lake. Further investigation revealed a corridor leading to the centre of the tomb. Researchers have done a lot of work, but it's not over yet.