I live in America and have been to Romania and England. Hoping to go to Bulgaria this summer, and with some luck visit some friends in Bucharest while I'm in the region.
Spain, Turkey, Portugal, Cuba (Haha Americans suck it you'll never visit Cuba ), Wales, Ireland and next month Dominican Republic will be added to the list.
But I've visited the country and seen no USA citizens and while talking to locals and learning more about the country they seem to deeply dislike you obvious due to America's constant distasteful attitude towards Communism and your pathetic failed attempt at invading them look at "Bay of Pigs incident" during the Cuban Missile Crisis and if I'm correct all this bad blood resulted in no trade and closed borders between the two I know Obama has been trying to normalize relations with Cuba though maybe this has resulted in somewhat open borders?
As an adult: France, United Kingdom, Turkey, Greece, Italy, Croatia, Bosnia and Herzegovina, Slovenia, Austria, Germany, Czech Republic
As a kid: My family lived in France when I was a toddler so there are a couple others in Europe I don't remember. And when I was a 8 or 9 went to a couple places in the Caribbean I don't remember the names of outside of some French islands. And we went across the border to Mexico a couple times.