Mindil Beach at Darwin is a popular one especially for the Mindil Market which I've never attended as I'm not a market person. There is another post done in 2015 and here is the link to the Market video.
In this post the first photo is of the first vehicle we had to tow out first caravan. The remainder of the photos are of the beach the last photo is another beach further along to the east of Darwin with two men going fishing with a net.