Fallingwater by Frank Lloyd Wright
Partially build over a waterfall in Pittsburgh, Penssylvania, Fallingwater was originally home to the Kaufmann family who owned a department store in Pittsburgh. The design was inspired by Wright's love of Japanese architecture.
Wright spent a lot of time fighting with the home owners so they could let him finish his vision of the house, to the point where he was about to abandon the project when Kaufmann sent some engineers to inspect the building he'd made as the foundation of the house. When Wright threatened to leave, Kaufmann got scared and decided to bury the engineers' report inside the house's foundation.
The rooms in the house are small and the ceiling is very low, presumably to force people into the social areas outside. The sound of water can be heard all around the house and it's particularly strong during spring, when the ice is melting.
The house was home to the Kaufmann family between 1937 and 1963 after which it was donated as heritage for the state of Pennsylvania. Now it's an architecture museum and one of the most worldwide renown examples of organic architecture.
Wright's architectural work served as inspiration to describe several buildings of Howard Roark, a fictional character in Ayn Rand's The Fountainhead, one of my favorite books.