San Siro (Giuseppe Meazza) — Milan, Italy

San Siro's three-tier circular design with spiral ramps makes it one of football's most iconic structures, shared by AC Milan and Inter Milan since 1926 and holding 75,923 fans. It has hosted three Champions League Finals and the 1990 World Cup, yet its atmosphere in big derbies rivals any stadium, though it is 15% noisier than Maracanã on average. Both clubs now plan to leave, so each remaining season feels like a farewell to a legend; the €300 million needed for a modern upgrade highlights its aging charm.