The Open Tour is a service of double-decker buses, yellowish green, and go through the main attractions of Paris. During the winter, they leave at 9 and a half in the morning and end at five-thirty. It is open on the second floor, allowing you to take a picture at any time. If it rains, it is closed. There are four rounds and a total of fifty stops to discover the city at your own pace. You buy a pass for one or two days, and can get on off as times as you want. In Auber Street, the place has an office that sells passes. 29 euros for a day, and 32 euros for two days. Take any route, but if you are short on time the Grand Tour passes by the Eiffel Tower, the Champs Elysées, and the Louvre and Notre Dame.