Visited the site in August 2011, one of the most spectacular fortresses in this part of Europe. The whole area is currently a park with free access. The only place with limited and fee entrance is a keep (or donjon) which is initial medieval castle (the beginning of a fortress)-nice views from the towers of the site and Danube river.
During my visit I saw a photo exhibition of all Danubian fortresses including Bac, Petrovaradin, Belgrade and Golubac - good idea for serial listing - all are very well preserved and remarkable places (especially Golubac).