Ever since we first saw the classic Gen X romance Before Sunrise, we've fantasized about finding ourselves with 24 hours to kill in a foreign city â preferably with a cute stranger we met on the way there. Sadly, most day-long stopovers don't involve strolling the cobblestone streets of Vienna with a '90s-era heartthrob. What they do typically involve? Inevitably getting lost in the city's mass-transit system.
