Finlandia Hall (Helsinki, Finland: 1971)

This seaside concert hall is a centerpiece of the Finnish capital, boasting a towering auditorium and high roof (meant to improve acoustics), curving balconies and an exterior of white marble and black granite. 

(Credit: © Alvar Aalto Museum  Rune Snellman)  Photo 1 of 11 in Design Icon: 10 Buildings By Alvar Aalto