Optimal road trips across the world Contains maps for the article, "Computing the optimal road trip across the U.S." and other similar articles. Optimal road trip visiting: 50 major U.S. landmarks 47 popular U.S. cities All 30 MLB ballparks by Chris Ladd Pure Michigan New York City walking tour Philadelphia walking tour 29 must-see stops in Canada 23 major Canadian landmarks 45 must-see locations in Europe 36 must-see sites in South America 36 major Indian landmarks by Varsha Paidi 47 U.S. National Parks