Finding a waterfall anywhere near St. Petersburg is almost impossible. Built on a river delta, St. Petersburg is mostly flat wherever your eye wanders. 40 kilometers south of the city on the Tosna River you'll find a 7,000 year old natural cascade with a vertical drop of two whole meters! The river originates in swamp lands rich in minerals, which explains its strange color. Now you know what you're looking at, lets enjoy Sophia's delicate sweet beauty amidst the rock and water of this unique cascade.