What's your favorite building? The world's best building design and innovation is being celebrated this week as part of the American Institute of Architects' (AIA) National Architecture Week 2015, which kicked off on April 12.
From Iceland's geometric glass Harpa building to the organic curves of Austria's Graz Modern Art Museum, the slideshow above highlights some of the world's most beautiful structures. Want more? As part of this year's Architecture Week programming, local AIA chapters are hosting events like historic walking tours and kid-friendly design projects.