Well here's an anecdote; I went abroad and at one place was enthralled by the coffee they served. Astounded, I bought some beans and felt quite happy of the "treasure" we had found. Later back at home, I went to a local coffee shop to buy some beans. Turns out there's a local coffee place that makes their own coffee, actually just a kilometer away where I lived. After trying out their coffee, the coffee I had brought abroad just seemed bland.
There's so many things you don't discover just because you aren't "looking". When going abroad you're actively seeking out great experiences and places. In your home town you're probably satisfied with sitting on computer and watching Netflix.