14. BMW Welt, Germany
This space age-looking building is not only eye catching, it’s a hub of green energy as well. The roof is covered in solar cells and the mind-blowing building makes use of natural ventilation. Additionally, large steel panels heat quickly in the sun, and help regulate the building’s temperature.
15. Cubic Houses, The Netherlands
These wonderful houses in the Netherlands were created by Piet Blom. The architect implemented this unique design when asked to build houses over a preexisting pedestrian bridge. Said to represent abstract trees, each cube contains three levels of livable space.
