
Image #4: Now you are looking around toward the southwest. That "object" sticking up in the background on the left bank, across the river, is the Eiffel Tower. The brownish building on the right is just one part of the Louvre museum. The bridge you see is the Pont des Arts (logical, right? since it links you to the Louvre...).
Image #5: You are looking to the right of Image 4, and you see more of the façade of the Louvre. The church that is right below you is St. Germain l'Auxerrois.
Image #6: You are now looking toward the northern end of Paris. See how the city is not flat, but hilly? What you see all the way in the background and on a hill is Montmartre and the Sacré Coeur church. You won't be going there today... Montmartre is in the 18th Arrondissement, on the Right Bank.
Image #7: You are now looking at the Eglise St. Eustache, which is in the Forum des Halles in the 2nd Arrondissement. It's in back of the Samaritaine department store.