My (Canadian) grandfather retired early (50-ish) and travelled extensively for ~15 years with my grandmother. I'm a bit envious of their ability to do so before

My (Canadian) grandfather retired early (50-ish) and travelled extensively for ~15 years with my grandmother. I'm a bit envious of their ability to do so before the modern hoards of tourists and social media. I was a kid at the time, and they'd mail me postcards from each new place they went.