He thought for a moment. "Well, I doubt we have time to see an opera, so perhaps the Louvre? It's the most renowned museum of art in Europa." He smiled softly. "After the airships, of course."
They emerged into the street, and he began strolling towards the air fields. As they approached, an airship actually took off, and he pointed. "See? The bag is filled with air that's heated to have less pressure than the air outside, so it rises."