Is located 1km north east of Invincible Trig Station at the easternmost end of a small valley. Measuring about 50m across, 18m wide from the back wall to the drip line, and 25m high, it has presence from sheer size alone. It also is the location of a lot of fading graffiti. It includes an internal natural spring, many glass shards dating from the 1930s and a cut log for a seat. Named by Brian Fox and Michael Keats on a Bush Club walk,15th August 2013.