The cistern is no place for the faint of heart on an organized tour. There are a lot of steps down to get into it. It's dark with a little light along the walk way. It's wet. It's crowded and you better keep up with your tour group or you'll be left behind. I was trying to get the right light settings on my camera so that I could take some good pictures in this dark place. I looked up and my tour group was gone. I eventually found them so I didn't have to implement plan B. Plan B was to retrace my steps to the entrance and wait for them to exit. There is only one way in and out. I would like to revisit the cistern on my own. That way I can take my time and not be rushed through. It was built in the 6th century and I'm sure there is more to see than I was able to see. Also better light settings will make for better pictures.