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Thank you @itchyfeetdonica. Its one of the beach entrances at Kawana (near the Kawana Surf Club)

Great to know! I was actually in the Kawana Surf Club a few times having 🍺 with friends, but never noticed those beach entrances.

hahaha i've done that more than a few times there ;). Its probably a 5-10min walk south of the Surf club before you get to the footpath behind the resort