It is 30 mins walk from international hot spring hotel. Very nice easy walk. You end up on a high point where there was a british security point in a.spot that oversees the whole oasis.
We loved it but the ruins are not impressive in themselves just the bit of history behind it.
There is a bit of hike to get to final lookout area which is the remains of a basalt fortress built by British troops during WW1 as a lookout to monitor Libyan incursions but once there, the walk is worth it.