It is tempting to say that every attraction and museum in Paris is a must-visit. To get the most out of your Paris visit, try mixing some history and modern trends during your trip: visit the Louvre museum and consider going to the Fondation Louis Vuitton to get a feel of the contemporary art trends. Go to Montmartre to see the Sacré-Cœur basilica, but also stay behind and walk through the streets of Montmartre to get a sneak peek of the Parisian life today.
Prepare to walk a lot. The best way to enjoy Paris is by walking or from a second floor of a double-decker bus.