A lake, with water in it!
Lake Hart is called a lake, because sometimes, on rare occasions, flood waters that originated thousands of kilometres way in Queensland, flow across the flat landscape and end up here and taadaa, there's water and huge numbers of birds flock to breed. Mostly though, there's no water, just salt as far as they eye can see. No swimming or fishing, though that would be very welcome! Not only overseas tourists, but many locals are bewildered by the use of the word lake and their hopes are rudely shattered when they arrive. (Here's a post about an unsatisfying visit to Lake Hart.)
What better place to relax than in the middle of a peaceful lake?