Hm. I used to be a flight attendant, so I’ve got quite a list - but I’ll only include the places I actually had time to look at.
North America:
USA:
NJ (lived there), NY, CT, PA, DC, MD, VA, NC, SC, GA, FL (lived there), AL, MS, TN, LA (Other than that, I did an East Coast Trip )
CA, AZ, WM, CO, UT, NV (West Coast Trip )
Canada: Ontario & BC
South America:
Mexico (Yep, Cancun - but I also went to Chichen Itza which was spectacular), Costa Rica, Panama
Europe:
Germany (live there), UK, France, Austria, Hungary, Switzerland, Italy, Vatican City, San Marino (go look it up, I think it’s about a foot wide ), Spain, Czech Republic, Yougoslavia (It still was when I visited, my father was born there, today I guess I’d have to say Serbia, Croatia AND Bosnia-Herzegovina why do I feel the sudden urge to add “12 points”?) , Russian (Then-Leningrad. Boy, was it ever beautiful)
Asia:
Turkey, India, Japan
Africa:
Egypt
Caribbean:
Bahamas
Dominican Republic (It’s Germany’s Cancun)
As to how travel broadens the mind, there’s places where I just went to relax for a vacation and places I really wanted to get to know. I think what expands your worldview is actually living in a foreign country. If you just visit for however long you’re just a guest and automatically fall in with the other tourists - if you’re trying to distinguish yourself from the masses, you’re just a tourist who’s not going down already trodden paths, but still a tourist.
There’s two kinds of tourists I hate. First (naturally), the obnoxious people who ignore local custom, are really rude and usually yell at everybody really loudly in their own mother language (because the louder you yell, the more foreign speakers understand you).
The other kind is the “backpacker”. These are people who pretend to be different. They’ll say: “Well, I’m not staying at a fancy hotel. I’m meeting the natives up close!!!” But all they actually do is hang around in youth hostels, brag about cheap deals they got, never get to experience anything (too expensive!!) and get on every native’s nerves (and noses, they usually smell bad).