Tipping on vacation: What is appropriate?

There are few moments when traveling that cause as much uncertainty as paying a bill. Whether after a meal, when "il conto" arrives, or after a guided tour - many vacationers ask themselves if tipping is appropriate, and if so, how much? The travel portal "Urlaubstracker" has analyzed tipping cultures around the world and shows in which countries tipping is expected - and where it is rather unusual. An overview.