You have a great view of Stone above and can see the ruins. In June 2018 only a few archaeological excavations were made. Otherwise everything is really ruin. I paid a ticket for the wall in Stone and I'm off to Stone. At the prohibition sign I walked away from the wall and up to the top (if you want to do it the other way round: watch out in Stone, there's a ticket control). You definitely need sturdy shoes, enough to drink, and should not be arachnophobia (early June?). On the way up I got lost somehow.