The first day we drove up to our house in Hum, we spotted this beside the one lane road heading to the town. Our first though was Croatian Stonehenge. But, then Kevin decided it was the virgin sacrifice arena - but he said Corinna, Nina and didn't need to worry ;-) We never did figure out what it was exactly, although there were smaller versions all over the place. Must be some sort of prayer garden or something, with different stops or stages or something like that. But, if you saw it at night, you would be creeped out as much as we were.