The Knob is a rocky outcrop right on the coast. Otherwise it's flat country going about 15 kilometres inland to the coastal mountain range. This is the view along the beach looking south (it was a cloudy day last I was there, last year).
Looking along the esplanade towards the Knob. They finally allowed buildings on it.
Along the esplanade a bit further back.
The Knob also protects a small boat harbour where the boat club is.
It may not help you with foliar fertilising, but at least you can now say you've seen Yorkey's Knob.