rock carvings at himmelstalund in norrkoping, sweden

art flooring stadium wall asphalt arena pattern soil textile racetrack floor geology snow map rock carvings petroglyphs granite bronze age historic heritage old nature background himmelstalund sweden norrköping norrkoping scandinavia nordic culture beautiful scenic scenery scandinavian europe swedish travel tourism ostergotland östergötland rocks history petroglyph ancient times stone ships ship warriors travelers boats texture red color landmark famous