Cologne (Köln) is a friendly, relaxed city situated on the Rhine River, famous for its magnificent Cathedral (Kölner Dom). The area immediately surrounding the Cathedral and the central train station is heavily trafficked by tourists and is generally safe, though it is the prime spot for pickpockets and minor scams, so keep bags zipped and secure. The safety dynamic changes significantly during the Cologne Carnival in February; the city is flooded with millions of costumed revelers. During this time, the massive, chaotic crowds require tourists to be hyper-vigilant of their belongings and prepared for rowdy, heavily intoxicated behavior in the streets and public transit.