Grand Mercure Apartments One Darling Harbour offer a range of fully serviced two and three bedroom executive apartments with a balcony and views of the city skyline or western Sydney. The apartments are surrounded by Sydneys premier visitor attractions,. including the Sydney Aquarium, Maritime Museum, IMAX Theatre, Powerhouse Museum, Sydney Convention Centre and Casino. Features include a 25 metre indoor lap pool, gym, sauna and spa.