Not sure where those castles where harvested. Where I come from, we have so many that you can actually buy some of them quite cheap. They where not harvested like ever. And they are mostly protected now. Which makes them cheaper since any one who wishes to reform has to jump through hoops. We have many old settlements you can also visit. From caves to old mosques, churches and monasteries, to towers, forts and castles. We have things from every century actually. Some still standing, others in ruins (wars and such). Celts, Romans, Arabs, everyone left its mark and you can visit those places. Some cities were even build over old cities and can be found excavating.