Deep inside this mound there is an ex-to-be-very-secret Russian neutrino lab. It belongs to the Russian Nuclear Research Center and was build to explore the neutrino particle properties.
It is a multi stored underground lab which is on 1000 ft (330 meters) deep mark inside this hill. It is also 11,000 ft (3600 meters) long and contains hundreds of rooms with the equipment, mainly the neutrino detection radars.
This radars are big metal tanks filled with white-spirit that has a light emission detectors and multipliers. They register neutrino mini-blasts in this white spirit environment and sent the real time reports to the main computer you would see its terminal below.
These tanks with radars occupy many many rooms on different floors so that none of the neutrino folk could pass unnoticed here.