While running up north to try and get some loot, I saw floating ponds along the road. The first one is the road that heads north out of Grishino on the west side of the road, and the second one was just west of Ratnoe, along the main road on the north side.
First pond found (road leading from Grishino): http://images.akamai.steamusercontent.com/ugc/47630581274945038/58780F5A1CB2FD918B4E8A945B7EFADF3B67D407/
Second pond found (west of Ratnoe on the road):
http://images.akamai.steamusercontent.com/ugc/47630581274945183/036963D9FE14E1C398B24255B697100AEEC3F6A0/