The Jameson Valley, seen from the end of Narrow Neck peninsula. You see Mt Solitary, the Ruined Castle and Warragamba Dam.
The Ruined Castle is a rock feature that many people visit on the way to Mount Solitary. It looks small here, but in reality is a huge pile of rock, towering above you. Some people climb right to the top spire.
This "mountain" is a popular overnight stop for people traversing the Jameson Valley. The path can faintly be seen at the right hand side (one third of the way in). It is rather easy to get lost - if you are not concentrating on where you go - but once on the track is not too bad.