Hi Sasha, For landmarks like the Trevi Fountain, we must use “the.” This is because when the name includes a common noun, such as “tower,” “river,” or “fountain,” we typically use the determinate article to refer to it: • The Trevi Fountain • The Eiffel Tower • The Nile River • The Statue of Liberty I hope this helps!

American tourists in Italy would not see any difference. I think I would be more likely to say to a friend, "meet you at Trevi Fountain" at noon. But then again, American tourists would not be experts on the matter.