1 / 4   After an eight-year construction, the Shimao Wonderland InterContinental Quarry Hotel, built in an 80-meter-deep abandoned quarry in Songjiang District in Shanghai, has sealed the roof of the primary structure recently and unveiled some of the rooms. /Chinanews Photo

2 / 4   Regarded as one of the architectural miracles in the world, the hotel stands at the quarry cliffs with its aquatic theme designed both visually and functionally. /Chinanews Photo

3 / 4   Standing at 18 floors with around 400 rooms, the hotel has only two rooms which are above ground - the lobby and the conference center. The main structure is underground, spanning the distance from the surface to a lake at the base of the quarry. /Chinanews Photo 

4 / 4   The hotel is expected to open its doors in May 2018, along with an aquatic-themed restaurant, sightseeing platform, bungee jumping on the cliffs and other entertainment facilities. /Photo via www.weburbanist.com