NEW YORK (REUTERS).- If you’re heading to Paris, you’ll stop in at the Louvre to see the Mona Lisa, in Washington the Smithsonian is a must-see and the Vatican in Rome should be on every museum-lover’s bucket list. With that in mind, online travel adviser Cheapflights (www.cheapflights.com) offers its top 10 museum destinations. Reuters has not endorsed this list: If you’re interested in history, architecture, art, religion, aerospace, or even wax, Washington D.C. has a museum – or 12 – that will pique your interest. The 19 Smithsonian museums, including the National Museum of Natural History, the National Museum of American History and the National Air and Space Museum, may appear to eclipse other institutions in the mid-Atlantic city, but other niche museums do just fine holding their own. Spend a morning reflecting at the Holocaust Memorial Museum and an early afternoon at Ford’s Theater – where Lincoln was shot – before strolling the National Mall and other