Botany Bay was considered the back door into Sydney, thus making the city vulnerable to a seaborne attack, so back in 1877 it was decided that a fort was to be built on the island. Connected by a footbridge to the suburb of La Perouse, the historic military fort and tunnels on this island can only be visited by guided tour.
In addition to the historical aspect of this island, the surrounding waters is the most popular scuba diving spot in NSW. In fact, on a best of days it’s not uncommon to see over 200 scuba divers in the water.
If you’re looking for a day out in the Sydney area, check out Bare Island. It’s historically a very interesting spot and, if scuba diving isn’t your thing, the photographic possibilities here are endless. It’s also a great vantage point for planes too, as the Sydney International Airport is nearby!