Zeltiņi Soviet Nuclear Missile silos

The former Soviet Army Missile Base is located in Medņukalni, Zeltiņi parish, Alūksne municipality. This nuclear missile base was a particularly secret military facility of the Soviet Army, and it operated in Zeltiņi, Alūksne municipality, from 1961 to 1989. The facility housed P-12 (8K63) and P12Y (8K63Y) surface-to-surface medium-range ballistic missiles with 4 launch pads. Their travel distance was 1 367 miles. During this period the army used barbed-wire to secure an area of about 741 ac from the Sinole-Silakrogs P34 national regional highway. The living and top-secret areas have remained a legacy even today. Concrete roads lead to places hidden from the eye at that time: hangars, launch pads and bomb shelters. Various structures for the maintenance and servicing of nuclear missiles are located on an area of dozens of hectares. Facilities providing the area with the autonomous supply of power, water and heat were destroyed with the withdrawal of the army. After the army left, some of the equipment was handed over to the local municipality.

The grenade I found was a Training grenade, however I did not know it at the time.