The spring "Klyuchi" is one of the sources of the Psёl River and represents a well-equipped recreational area with a spring, a baptismal font, and a chapel in honor of Saint Michael the Archangel.

A strong group of springs forms a swift stream with a high water flow exceeding 70 liters per second. The spring basin is decorated with wooden structures, and the bottom and slopes of the riverbed are lined with natural stone. A baptismal font with stairs and a changing area has been equipped here, and an artificial waterfall cascade has been created. Today, the tradition of water blessing at "Klyuchi" has been revived during the Epiphany holiday.

As part of the improvement of the recreational area, the pond and riverbed have been cleaned, a beach area with changing rooms, shaded canopies, and a beach volleyball court has been arranged. Visitors can also explore the ethnographic village "Kostroma."