But if simply admiring nature isn’t exactly your thing, no worries. There are guided cultural tours, fishing, stand-up paddling (SUP) – you can hire kayaks and SUP boards here – boating, jet-skiing, fresh-water swimming, as well as ocean swimming and much more.
Short bush-walks are popular here but if you're feeling gung-ho, have a crack at the Coastal Walk, stretching 26km one-way from Bundeena to Otford, and taking in coastal lookouts, secluded swimming spots, seasonal wildflowers and whale-watching. This two-day hike is a grade 5 walk, according to the Australian Walking Track Grading System, which means it takes in tracks which "are likely to be very rough, very steep and unmarked", and is only for "very experienced bushwalkers with specialised skills, including navigation and emergency first aid", as described by National Parks.
For surfers, there are often awesome waves on the coast at Garie Beach, around the corner from Bonnie Vale.
You name it, you can do it here in the Royal National Park; you can be as energetic, or as bone-lazy, as you want to be.
If you, during your stay, get the urge for a bit of Cronulla culture, you can always catch the ferry from Bundeena wharf – it’s a nice 40-minute ride across Port Hacking.