Villa Mairea (Noormarkku, Finland: 1939) 

Created for industrialist Harry Gullichsen and his wife Marie’s, this private residence fused organic and modern styles and stands as a masterpiece. Curved shapes mixed with a literal forest of wooden columns inside the rural home, creating a flowing environment and harmony between the interior and exterior.

(Credit: LeonL, creative commons)  Photo 5 of 11 in Design Icon: 10 Buildings By Alvar Aalto