MAS (Museum aan de Stroom) is a contemporary architectural masterpiece opened in 2011. This ten-story tower is clad in red Indian sandstone and undulating glass panels. The museum tells Antwerp's story as a world city through collections spanning art, ethnography, and maritime history. The panoramic rooftop terrace is free and offers the best views over the city, port, and river. Climb the external staircases to enjoy stunning vistas from each floor. The museum is located in the trendy redeveloped Eilandje district. At night, the building glows red, creating a striking landmark on the waterfront.