Jervis Bay is an amazing place and I love discovering the history of the area, both human and geological. For instance, this is Mermaids Inlet on the northern Beecroft side of the bay. Those massive rocks that you can see lying on their edges are the size of a bus and they were put there not through the action of erosion, but because of massive tsunamis that hit this coastline as recently as 12,000 years ago. The rocks didn't fall from the cliffs but were washed out, rotated and then dropped again as the waters of the massive waves abated. Picture for a moment how big a wave would have to be to move a 6m boulder up a 32m high cliff face! Much of Jervis Bay appears to owe its appearance to these tsunamis. The local aboriginal community, who were living here before the end of the last ice age and the rising waters that created the bay itself were undoubtedly present for some of these catastrophic events which is an incredible thing to consider.