What is 1,181 feet long, 688 feet wide and 350 feet tall? The Tropical Island Hall, which is located in the heart of Europe near Berlin. Not only could the Statue of Liberty stand inside it, 8 football fields could also fit inside these 16-acre grounds. This indoor pool is gigantic! Not only did architects have to worry about how they would build such a large pool, but they also had to find a way to build a building with enough structural strength to hold the volume of the rain and snow that can accumulate on the 17-acre roof. This resulted in almost 14,000 tons of steel being used. This nearly 200 million cubic feet building is one of the largest buildings on earth by volume, and is the world’s largest single hall without supporting pillars inside. The initial reason the building was built was to be an airship hangar. However, the company went bankrupt before they could put it to use. That’s when Tropical Islands Resort purchased the property to build the grounds into a holiday park. Despite the massive size of the building, it is lightweight in terms of design with five arching steel members that form the bones of this semi-cylindrical structure. To make the hall into a tropical paradise, a special UV-translucent panel was inserted on the south side of the dome to let the sun shine in. Inside the massive building is a 600-foot long beach that transcends into a warm artificial ocean that has its own tropical islands. Complete with about 50,000 plants, this island can hold up to 6,000 vacationers.