Paris is a place that has something special for anyone. It is one of the most walkable cities in the world, probably because it is the best place for shopping, looking at art, visiting museums.
One of the most convenient ways to see the sights of Paris is with the Paris Museum Pass which is a prepaid entry card allowing to visit into over seventy museums and monuments around Paris. Another similar thing is the ParisPass, another a pre paid entry card to attractions like The Louvre, The Arc de Triomphe, river cruise. It also offers free metro & public transport. Certain places of interest have choke points – restrictions on the number of visitors, namely The Eiffel Tower, Sainte-Chapelle, The Catacombs, and the steps to climb the top of the Notre Dame Cathedral. Also note – major museums and galleries are closed on Monday & Tuesday. Also, all national museums may be visited free of charge on the first Sunday of the month, which naturaly causes big queues and crowded exhibitions.