Following breakfast this morning its time for you to see and explore Paris at your pace armed with the Paris one day Hop On Hop Off pass. A ticket for you to visit to the Montparnasse Tower is included as it is at one of the stops of the Hop On Hop Off route and the view from here will definitely blow you off your feet! From the 4 routes of the Hop on Hop off bus, the Montparnasse Tower is on theMontparnasse - Saint-Germain Route and get off at Montparnasse stop, other than the great view. This pass can be used on any of the routes, they can spend their time seeing the places covered on the Paris Grand tour route which is the most popular route and when they get down at Notre Dame instead of taking the Paris Grand Tour bus, they can hop in the Montparnasse - St Germain bus and then get down at the Pantheon, spend some time there or just continue to the tower for some best views of Paris!! Then their next stop would be Les Invalides, where if they want they can then Hop again into the Paris Grand Tour bus and proceed. So in short they can do 2 routes and cover the major spots just by changing their bus at Notre Dame since they would spend sometime at Notre dame to see around and then get in the other bus and continue. Later in the afternoon spend your time shopping at any of the great shopping malls like the Galleries Lafayette for the best in haute couture and places that give the word shopping a completely new meaning. Overnight in Paris