The 아토미움 (Atomium) is a unique building located in 브뤼셀, 벨기에. Constructed for the 1958 World Expo, it represents an iron crystal magnified 165 billion times. The structure consists of nine interconnected spheres, which are 18 meters in diameter, and is a popular tourist attraction. Visitors can explore the spheres through escalators and enjoy panoramic views of 브뤼셀 from the top sphere. The Atomium also houses exhibitions related to science, architecture, and the history of the building itself, making it a significant cultural landmark in 벨기에.