Cobargo resident Elizabeth Andalis is annoyed after discovering an overturned motor vehicle on Haywards Beach, Bermagui on June 23.
She said the vehicle appeared to be some sort of buggy.
"I saw the vehicle and was immediately annoyed," Ms Andalis said.
"I saw the tyre tracks through the sand dunes coming down from the wetlands, which is a sensitive area."
During Ms Andalis' walk, the tide began to rise and wash over the vehicle. She also noticed the seat laying near the dunes 50-metres away from the vehicle.
Narooma Police said it is an offence to drive a vehicle on any beach without a permit.
Ms Andalis regularly walks the stretch of beach three times per week with her two rescue dogs, Kiah the bull-Arab and Jasper the three-legged border collie.
Only 100-metres away from the overturned vehicle, her dogs inquisitively inspected a small shark.
"It hadn't started to smell or anything," Ms Andalis said.
"I had never seen a shark with a head like that.
She looked online to see what shark it might have been.
"I thought it could be a crested hornshark," she said.