Cloud Forest

Cloud Forest at Gardens by the Bay is one the Singapore's most impressive attractions. This incredible glass dome can be seen from miles away and is just as stunning inside as it is from out. Its smaller brother, Flower Dome, also makes up the pair of giant man-made structures, but it is the larger, climate-controlled Cloud Forest that attracts the most visitors with its jaw-dropping (related to the beautiful design and construction of buildings, etc.), spiraling walkways from the top and the world's tallest indoor waterfall that rains down from over 100 feet above. 

Read more at http://www.gardensbythebay.com.sg/en/attractions/cloud-forest/visitor-information.html