I've kept a scorecard from every course I've ever played be it a dogtrack or major venue. 23 years in the RN means I've got quite a few from all over the world. They're in photo albums in order to keep them tidy. Not every course has ball markers etc but the one thing every course in the world has that is unique to them is a scorecard. Now I'm out the Navy the number of additions has slowed down but I'm going to Australia and Arizona soon so hopefully I can add to the collection then.