Sunday marked the 13th No Pants Subway Ride, an annual event put together by New York City's Improv Everywhere group. The event began in NYC — a city that offers a plethora of beautiful male riders — with a handful of participants baring their ass in the middle of winter. The pants-less party has now spread globally, with over 60 cities in 25 countries taking part. The New York event remains the epicenter, with over 4,000 participants at the most recent ride. On the next pages, take a gander at the Big Apple party, and shots from various metropolises, including Paris, Mexico City, and Los Angeles. Which city had the best sights?