A hollow ball near Dubna, with a diameter of about 18 meters, was located in the forest in the Kimry district of the Tver region, near the village of Ignatovo, not far from Dubna. This ball was made of fiberglass with a honeycomb structure and was a sphere truncated at the bottom, firmly attached to the ground. Initially, the ball was intended to
Interesting places: Kimrskiy District
Places of interest: 1