In 1829 British settlers claimed the land and in 1831 built Western Australia’s oldest public building, the Round House jail, on the natural promontory of Arthur Head. The Roundhouse, the Whaler's Tunnel which runs underneath it and the other historic and natural features of the area make for a wonderful journey through history, nature, culture and art. | In 1829 British settlers claimed the land and in 1831 built Western Australia’s oldest public building, the Round House jail, on the natural promontory of Arthur Head. The Roundhouse, the Whaler's Tunnel which runs underneath it and the other historic and natural features of the area make for a wonderful journey through history, nature, culture and art. |