Răspuns:
1. Cindy visited France. (Reference to the Eiffel Tower and walking to the top suggests she is in Paris.)
2. It's not specified which country Cindy is in, but the mention of paella and a bullfight, as well as the hot weather, suggests she might be in Spain.
3. Cindy is going to Venice, Italy. (Explicit mention of Venice.)
4. Cindy is in Switzerland. (Reference to people speaking German, French, and a little Italian, along with clean streets and beautiful mountains.)
So, the countries Cindy visited are France, Spain, Italy, and Switzerland.