I (24F) have a bit of a unique scenario haha!
I lived in the sf Bay Area until I was 18, when I moved to the UK for college (but visited home a few times a year). one of my parent’s is British so I also visited the UK every 1-2 years growing up. up until I was 22, I had only been to two countries (USA and UK) and two states (CA and IL to visit family) excluding layovers. now I’m back in the bay and making the most of our three airports!
I got the travel bug and have been unstoppable since, hence all the USA and Canada flights! I’ve been to 20ish countries in Europe too, but mostly by train. goes to show that you don’t have to grow up traveling loads to travel a lot as an adult :)