This. This is a favorite photo from last year. In Europe (London, to be exact) with 5 people who went from strangers to good friends in a few hours.
Some of us met each other just hours from boarding the plane in NYC. There is just something very bonding about traveling together. Taking in the smells, tastes, accents and wrong side of the road driving all at once can be overwhelming, but it helps to have others around who are experiencing the same things.