Indeed Sirna is a village South of Ploiesti,
here is its location in Wikimapia .
There are quite a few such airfields developed lately in Romania, and the latest changes allowing aircrafts under 5700 kg to use them without the need of certification, and airspace relaxation with the abdication of the 24/48 hours prior planning and acknowledgment, simple normal FPLs being enough even for border crossing, will hopefully see a GA rise. Unfortunately bigger "normal" airports still have no idea about what GA is, ripping off huge fees, even hundreds of euro for a visit.