aerial view of otanaha fortress in gorontalo-indonesia. the stone walls of the otanaha fortress

v01640079 unknown v100 dcim 900media dji_0237 jpg aerial view otanaha fortress gorontalo-indonesia stone walls fort fortress otanaha aerial view trees hill travel nature landscape construction building architecture old stone castle rock tourism culture fortification structure material column gate ancient age outdoor monument walls stronghold landmark ruin heritage historical stonewall gorontalo strong exterior destination local famous fragment outside fort object background military town