The sight of a hairy-legged spider scuttling across the bonnet of the car might have been evidence we were in the great outdoors, but something still didn't feel right.
While the spider was wedging itself into one of the door frames, I was checking the map to confirm that we were indeed less than 25km north of the centre of Sydney. But the location of this protected nature reserve is not the only surprise provided by a visit to Ku-ring-gai Chase National Park, one of Sydney's lesser-known natural gems, which happens to be the second-oldest park in Australia, established in 1894.
Named after its traditional owners, the Guringai people, the 15,000ha park has at its heart a flooded river valley, which stretches as far as the coast.
Within the park's boundaries are habitats including open forest, heathland and estuarine riverbanks, making it an ideal sanctuary from the blur of city life.
About 20 mapped walking trails weave across this scenery, including sections of the Great North Walk as it passes through from Sydney to Newcastle.