A short walk from Darling Harbour, this cavernous science and design museum whirs away inside the former power station for Sydney’s defunct, original tram network. The collection and temporary exhibitions cover everything from robots and life on Mars to steam trains to climate change to atoms to fashion, industrial design and avant-garde art installations. There are great options for kids of all ages but it's equally intriguing for adults. Grab a map of the museum once you're inside. Disabled access is good.
The Powerhouse is due to move to a new location in Parramatta that is set to be completed in 2022.