Transylvanian Fold

The Tansylvanian Fold is a fold located in the Carpathian Mountains. It had been considered lost for centuries but recent developments led to it's rediscovery within the property of the Zulfir family. The fold houses the recently reopened Arcane Academy of Hermannstadt and the surrounding city of Old Hermannstad.
It's entrance is an old stone archway called the Arch of Solomon. Since most naturally occurring folds do not have set entrances, being intertwined with regular space, the existance of the archway raised a debate about wether the Transylvanian Fold is natural or created.