Old Windmill

Built by convicts in 1828, this sandstone windmill is reputedly the oldest surviving building in Queensland. Due to a design flaw, the windmill sails were too heavy for the wind to turn, and a convict-powered treadmill was briefly employed before the mill was abandoned. The building was converted into a signal post and later a TV broadcast site and meteorological observatory. The interior isn't open to the public, but you can walk around the base.