You can read here about the success of british Imperial College Caving Club expediton to Migovec Plateau, Slovenia.
“ Vodna Sled 2010 was an epic success – in all we discovered 2.2km of new passage, all below -500m, all in Vrtnarija using Camp X-Ray (Reloaded, four bed camp) -550m as a base. Vrtnarija is now 8776/807m, 7th longest and 12th deepest cave in Slovenia. Connection with System Migovec (11300/970m) would yield a 20.075km system. Only 500m of additional passage would be necessary to make it the longest system in Slovenia. “