Board Thread:General Discussion/@comment-26830263-20180519135704/@comment-26967699-20180519160142

MrsRobbStark wrote: http://onceuponatime.wikia.com/wiki/File:722UnitedRealm4.png I think the castle at the back is Mount Olympus. It looked like the Olympus castle from Season 5.

http://onceuponatime.wikia.com/wiki/File:513GoingToOlympus.png It seems to be Mount Olympus.