Magincia
OSI is currently running an event in Magincia. They are doing a ruined city type event so they basically deleted it from the map files and rebuilt the city with statics in game so they could change it on the fly. If you update your client to 6.0.4.0 you will not be able to see the buildings even though they still exist. Hopefully when the event is over they will release a new map file that will resolve all of the issues.
OSI is currently running an event in Magincia. They are doing a ruined city type event so they basically deleted it from the map files and rebuilt the city with statics in game so they could change it on the fly. If you update your client to 6.0.4.0 you will not be able to see the buildings even though they still exist. Hopefully when the event is over they will release a new map file that will resolve all of the issues.