What to do in Paris? Visit the most popular attractions in Paris, such as the Eiffel Tower, Opéra Garnier, Sacré-Cœur. Take a long walk from Place de la Concorde to Arc de Triomphe through Champs-Élysées. If it is your first trip to Paris, consider taking a sightseeing tour on a double-decker bus. It gives a good idea of the city and helps learn about the best places to visit in Paris. You can hop-off at any stop, get acquainted with the attraction, and then hop-on to the next bus of the same sightseeing company and continue your journey in Paris.