I have visited these countries:

1) Canada & Québec (Montréal & Toronto)

2) Las Vegas (Almost all the casinos)

3) Boston (Boston Science Museum & Museum of Fine Arts)

4) New York (The Metropolitan Museum)

5) Orlando (Walt Disney and Kennedy Space Center)

6) Atlantic City (Almost all the casinos)

7) Romania (Bucharest, Ploiesti, Black Sea)

8) Los Angeles, Pasadena (Caltech)

Travels are extremely risky, on my opinion.