I think there were a lot of TRV-ing done on this topic and ofcourse the crop circles. Crop cirlces are a way to comunicate between different alien races and some kind of guiding system. Tibetan monks said alien race will save Earth and they are interacting with us on regular basis. You can check Psi Tech - Matrix website for more info.

I havent seen any UFOs, I guess Slovenia is just not interesting to them.