1963 Chevrolet Corvette Stingray Source: Supplied 1963 Chevrolet Corvette Stingray. A split-window 1963 Chevrolet Corvette spearheads the Shannons Spring Classic auction in Sydney later this month. A COLLECTIBLE "split-window" Chevrolet Corvette spearheads a roll-call of muscle cars for sale at Shannons Spring Classic Auction in Sydney later this month. The 1963 coupe has been one of the most bankable designs over the model's six decades. This silver example has a 224kW 5.4-litre V8 driving through a four-speed manual gearbox and was fully restored a decade ago. Shannons expects it to fetch up to $90,000. Among local heroes is a 1969 Holden HT Monaro GTS 350 Coupe, thought to have had just two owners. Mainly original apart from a recent rebuild for its 5.7-litre V8, it could fetch $88,000 when it goes under the hammer on October 21. THERE are few stranger exercises than one that involves sitting on a bike in a pool, water almost at shoulder height, feet strapped into paddle-like pedals, alongside a whole bunch of people doing the same thing. But this is how you perform aqua-cycling, a new spin on spinning class that hails from bike-obsessed France. Dorine Denjean, founder of aquaAllure classes in London, claims it is the fitness secret of slender French women, who have been flocking to pools packed with underwater bikes for the past decade. "There's nothing quite like it for firming and toning your legs," says Denjean. A class lasts 45 minutes and, much like regular spinning, is performed to thumping music but on bikes secured to the pool floor by suction pads. It seems to have all the benefits of ordinary spinning but fewer drawbacks. Spinning in a pool uses different muscles to those used out of water and focuses on the abs. It feels deceptively easy because the cooling effect of the water means you don't feel sweaty and your face doesn't turn crimson. QUEENSLAND'S Fraser Coast Regional Council and the National Trust of Queensland will stage a free Open House event at the city of Maryborough on October 26. There'll be an archaeological dig, bell-ringing at St Paul's church tower (the oldest in Queensland) and entry to about 25 significant buildings. The program includes tours, self-guided trails, a garden tea party, music and exhibitions at Gatakers Artspace, steam train rides and brass bands. Maryborough is about three hours by road north of Brisbane and was settled in 1847. maryboroughopenhouse.com.au