• Under-16s go free, making this one of the cheapest famous sights in the city
• 20 to 30 minute visit, open plan with no queues or roped-off rooms
• Free open days, including the first Sunday of each month, Sant Jordi, and La Mercè

Mies van der Rohe built this pavilion for Germany at the 1929 International Exposition; it was demolished after the fair and rebuilt stone by stone in 1986. There are no rooms to queue through: kids roam freely between floating marble walls, spot the bronze statue in the small pool, and watch reflections shift across the water and green glass. A visit takes 20 to 30 minutes, and the Fundació runs occasional family workshops.