Amager

With a price tag of 300 million dollars, the new home of the Danish National Symphony Orchestra is also (so far) the second most expensively built concert hall in the world. Designed by French architect Jean Nouvel, the structure looks like a weirdly translucent blue cube. This is completely intentional: at night concert scenes are projected onto the cube's surfaces to share the experience of what happens inside with the community outside. While the exterior looks pretty industrial, the concert hall itself (which sits 1,800 people) is visually stunning—the yellow cedar-wood used throughout the space is warm and inviting, with handcrafted seats and an incredible 6,000-pipe organ.