World 's second - largest indoor # ##park found in Alberta , Canada . Elsewhere , the Dolphin Plunge water slide takes passengers on a white-knuckle ride through a dolphin-filled aquarium and riders brave enough to take on the Omaka Rocka blast down a series of flumes and funnels . Watercube Waterpark in Beijing is China 's second - most popular attraction , after Great Wall . Tropical Islands water ##fall in Germany is inside largest free - standing waterfall in the world .
World 's second - largest indoor # ##park found in Alberta , Canada . Watercube Waterpark in Beijing is China 's second - most popular attraction , after Great Wall . Tropical Islands water ##fall in Germany is inside largest free - standing waterfall in the world .