1. Nantes is known for its historical connection to the shipbuilding industry, and it was once one of the largest ports in France, playing a crucial role in the Atlantic slave trade. 2. The city is home to the famous Les Machines de l'île, an artistic project that combines the worlds of Jules Verne and the mechanical creations of Leonardo da Vinci, featuring giant moving machines like the Grand Éléphant, which can carry up to 50 passengers. 3. Nantes was awarded the title of "European Green Capital" in 2013, recognizing its efforts in sustainability and urban ecology, including extensive green spaces and initiatives to reduce carbon emissions.