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People visit the Intercontinental Shanghai Wonderland, also known as Shimao Quarry Hotel, in Songjiang District of Shanghai, east China, Nov. 13, 2018. The 88-meter-deep hotel, built vertically along the precipice of an underground, water-filled quarry, made its public debut in Shanghai Thursday. It has boasted its engineering feat and cliff-view rooms that allow guests to stare into the abyss. The 336-room hotel has 18 floors -- two underwater and two above ground -- complete with a restaurant and sports and recreation facilities including rock climbing and bungee jumping, according to its developer Shimao Group. (Xinhua/Fang Zhe)