Museum Cité des Sciences et de l'Industrie in Paris

You're standing at the Cité des Sciences et de l'Industrie, in the Parc de la Villette in Paris. It's one of the largest science museums in Europe. Look at that huge building of glass and steel, designed by architect Adrien Fainsilber. On the park side you'll see three giant glass greenhouses, known as Les Serres. Each one is 32 metres high and 32 metres wide. Their façades were the first structural glass walls ever built without any framing or supporting fins.