Bilbao Arena is a world-class basketball arena and is renowned for its unique architecture as well. Perched on a hilly side, the stadium's facade is inspired by a tree on a rock. Its metal form is covered with decorative panels that is reminiscent of leaves in varying seasons. This state-of-the-art stadium opened its doors to fans in 2010 and also houses a gymnasium and swimming pool. Besides regular matches and competitions, it is used for concerts and other cultural events. Even if you aren't a basketball fan, a visit to this place will surely pique your interest due to its architectural beauty.