Chevy Chase Circle, Washington, D.C. sits exactly on the line where the District ends and Maryland begins. It’s where Connecticut Avenue NW meets Western Avenue at the top of the city, and the state border runs right through the fountain in the middle. Drive halfway around and you’ve left the District; keep going and you’re…

Columbus Circle, New York, NY is the busy traffic circle at the southwest corner of Central Park, where Broadway, Eighth Avenue, Central Park South, and Central Park West meet at 59th Street. Christopher Columbus stands on a column about 70 feet above the traffic, surrounded by glass towers, park gates, and one of Manhattan’s busiest…