What are some examples of aluminum in architecture?

Aluminum is a versatile material in architecture due to its strength, light weight, and resistance to corrosion. Some examples include the Empire State Building's spire, which was originally clad in aluminum, and the Petronas Twin Towers in Kuala Lumpur, known for their aluminum and glass facade. The Guggenheim Museum in Bilbao features an aluminum-clad exterior, and the Beijing National Stadium, also known as the Bird's Nest, utilizes aluminum for its intricate lattice structure. Additionally, aluminum is commonly used in curtain walls, window frames, and roofing systems due to its durability and sustainability.