Sand
Wall
Portsea Hole
Maritime Zone, Australia
Portsea Hole, located about 500 meters from the Portsea Pier in the Maritime Zone, is a remnant of the old Yarra River. The top of the hole is at 14 meters, and to the north, there is a vertical wall approximately 75 meters (250 feet) long that drops to sand at 27 meters (90 feet), then descends into a sand bowl that bottoms out at 33 meters (110 feet).
