Source: BoredPanda.com
1. Stone House (GuimarĂ£es, Portugal):
2. Museum of Contemporary Art (Niteroi, Rio de Janeiro, Brazil):
3. Casa da musica (Porto, Portugal):
4. The National Library (Minsk, Belarus):
5. National Theatre (Beijing, China):
6. Conch Shell House (Isla Mujeres, Mexico):
7. Bibliotheca Alexandrina (Egypt):
8. Rotating Tower (Dubai, UAE):
9. Kunsthaus (Graz, Austria):
10. Museum Moderner Kunst (Viena, Austria):
100 of them here: http://www.webady.net/blog/14/11/2008/le-top-100-des-architectures-les-plus-insolites/