4) Philadelphia, PA
The city of Philadelphia is nicknamed “The City of Brotherly Love,” but Travel + Leisure readers didn’t think this slogan was true. According to one reader, if you show up to baseball or hockey games in Philly wearing the other team’s gear, you can expect to be heckled. If you want to avoid being heckled at the ballpark, spend your time at one of Philly’s numerous museums instead. If you love art, check out the Barnes Foundation, which has impressionist, post-impressionist, and early-modern paintings. You can also visit Philly’s many historical sites. Take a tour through Independence Hall, and learn all about the Liberty Bell at the Liberty Bell Center. Also, don’t miss Elfreth Alley, the US’s oldest continually inhabited street. If you avoid angering any Phillies or Flyers fans, you should have a great trip in Philadelphia.