During colectivization under soviet demonic occupation, when trying to plant additional vineyards on istrita hill at low altitude the farmers discovered entrances in tunnels going to et bases in istrita hill, near former romana caster of pietroasele and when they tried to enter they fell dead, and after that they were closed. on 30th of september 2018 i did see for 5 seconds a plack flying saucer at aprox 500 meters of peak of istrita hill ascending and then teleporting in space at the right of the peak.