InterContinental Shanghai Wonderland Opens in a Flooded Quarry
CONFIRMED84% CONFIDENCEHappened as dated: IHG's own release announcing 'the grand opening of InterContinental Shanghai Wonderland' is dated 15 November 2018, and ArchDaily's project entry gives 'Opened: 15th November 2018'. Wikipedia's[2] 20 November 2018 start of operations is the outlier.
IHG opened the InterContinental Shanghai Wonderland, an 18-storey hotel built into the walls of a disused quarry with two underwater floors set against a lit aquarium.