Evan, my coincidence tale takes place in Germany too! I went there for two weeks in 1998. Before I went, my mother (a retired teacher) told me that a group of students and teachers from her high school would be there at an overlapping time. But I didn't find out where and when they would be, and I didn't even know what my specific plans were.

One day on my trip I went to castle Neuschwanstein. I saw a group of kids, heard them speaking english, and saw that one was wearing a t-shirt with the name of my mom's school and a musical they had recently performed. So I asked, and yes those were some of my mom's students!