On the recent Labor Day weekend, I took my husband on a trip to Kosciuszko National Park across state lines in New South Wales. When I’d planned it back in May, the park’s eco-cabin accommodation was booked out for months and had a two-night minimum. So I went for a three-day weekend during a U.S. holiday when Australians would be working and bingo! It was mine. The park’s northern area of Yarrangobilly Caves is only about 2.5 hours southwest of Canberra, and boasts more than 400 caves, some dating back several million years.