https://www.facebook.com/nastic.ivan?fref=gc&dti=2205123638&hc_location=ufi
Lenčina pećina (Lenka’s cave) near Valjevo, Serbia, 143 meters long, about 70 meters deep, almost all the time wide about 0,25 meters, sometimes less, sometimes more, local speleo club use it as a training place, we came in in the evening, and came out in the morning. Kontact of local club> https://www.nadji.info/…/vladimir-mandic-manda…/ve68762/
renesansowiec 