Musée du Parfum is the place to understand the art of perfume-making and how it has developed over the centuries. This museum is also known as Fragonard Musée du Parfum. Taking a tour here is one of the top free things to do in Paris as it does not charge an entry fee. It is known for having the collection of antique perfume bottles dating back to ancient Egypt. The interior has a period furnishing, adding charm to the whole setting. Attend an apprentice perfumer workshop and learn about a perfume organ on display when you are here.