Its name a misnomer, the Round House is actually a dodecahedron, with its 12 sides erected around a central yard. Built in 1831 by the first settlers as a prison, it is the oldest public building in the state. At 1pm each day, the Round House’s signal station fires a cannon – the time gun – and this activates a time ball (an instrument once used to give accurate time readings to vessels out at sea). The Whalers’ Tunnel underneath the Round House was cut by a whaling company in 1837 for access to Bathers Bay. 10 Arthur Head; (08) 9336 6897; open 10.30am–3.30pm daily; admission by gold coin donation.
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