Boguslavskaya granite outcrop is a geological monument of nature. Reaching the height of 10-12 meters are found along the river bed of Ros in the Central part of Boguslav. In river valley, on its slopes are scattered affectively anchored in the ground granite boulders. Age of boguslavskij granites is 2 billion years old. In the place where the two arms of the Ros washes the granite island, picturesque rapids are formed. One of those places with deep soaking tub, over which hangs a high rock, the locals call "the Pit".