Tri Sestry (three sisters) is the name of the place where Sestrenka (sister) and Geyzernaya (geyser) rivers flow into Shumnaya (noisy) River. Visitors rarely venture here, especially after the landslide, since Pervenets Geyser stopped functioning and old path got blocked. But people who do come down here usually glad they did. This place has a certain sad charm.
Shumnaya River canyon here is at its deepest point — 600 meters. Canyon makes a sharp turn — 135 degrees, and changes direction — from north eastern to southern.
Shumnaya River cuts through a solid layer of volcanic lavas and rushes down as an 80-meter high waterfall. Upper part of the waterfall is hidden behind the rock ledge and can only be heard, but not seen. Lower part of the waterfall is easily seen and comes down the valley as wide cascade of turbulent rapids. Below those rapids, Sestrenka River flows into Shumnaya River by the way of a 6-meter waterfall. 200 meters further Geyzernaya River flows into Shumnaya as well.
Sliyaniya (confluence) Peak rises above to the south from the place. The Tsarevna-Lyagushka (frog princess) Rock is located across from the peak.
Near the mouth of Geyzernaya River, Pervenets geyser is steaming, buried by a landslide but refusing to give up. Nearby, on Shumnaya River bank, a few hot springs are spitting up hot water and steam. It's the lowest thermal platform of the Valley of Geysers.
Further south all the way to the Pacific Ocean there's only cold water of mountain rivers and thicket of Alder and Siberian Dwarf Pine with no hint of the wonders of Nature hidden in Geyzernaya River canyon.