The first shots fired by Australians during World Wars I and II came from Fort Nepean, at the entrance to Port Phillip Bay in Victoria. A few minutes after war was declared in 1914, a German ship visiting Australia tried to make a run for it. Shots were fired when it wouldn’t heed orders to stop and, ultimately, the ship surrendered. Then during World War II, another ship didn’t respond to signals from the fort. It too, received some shots. That one turned out to be an Australian freighter so why it wouldn’t identify itself, I don’t know.
The fort was dismantled after WWII and it opened as part of Point Nepean National Park in 1988. We took a shuttle bus that runs from the quarantine station to the fort. Private cars aren’t allowed near the fort, but you park about a mile away and take a beautiful cliff walk there.