Mine was SFO>AMS on KLM. I was 16 and going to visit family in the Netherlands with my step mother. We travelled all over the Dutch countryside by car and got to visit AMS and a number of other significant cities. I was considering college at the University in Rotterdam. I also took the train to Paris by myself for 2 weeks. It was amazing fun and Paris, as cliche as it sounds is one of my favorite destinations after 20 years of not going. I just booked a flight there for September.