PRE: image of a great piece of architecture---The Fallingwater

https://www.khanacademy.org/humanities/ap-art-history/later-europe-and-americas/modernity-ap/a/frank-lloyd-wright-fallingwater

The fallingwater is one of the greatest piece of architecture in the 20 century. It is designed by Frank Lloyd Wright who is the protagonist of organic architecture. He devoted to design architecture which promoted balance between nature and manufactured building. The fallingwater also challenge impossible that this building is constructed abover the waterfall. This architecture inspires me that always keep challenging.