The bunker of wonders is a renovation project of a former air-raid shelter that is under Piazza Giuseppe Grandi, Milan, Italy. It is developed from the worldwide design strategy of bunker diffuse museums and as the headquarters to connect them through a global network. The concept of the project is from the metaphor of the Aladdin’s cave, the “cave” in the city collecting “treasures” from all over the world that people can enter and explore. It aims to convey the new meaning and value to the public as well as to provide a unique insight to investors and organizations to use bunkers for preserving our preciousness to survive in the future.