She wishes to visit the country whose scenery is beautiful.

(In this sentence, what is 'the country'? Is it a country like China, Japan, or brazil? Or is 'the country' an area in a country such as the USA.?)

Country means a place such as China, Korea, Brazil, or France.

In the given sentence, "the country" refers to a specific country, as opposed to a general region within a country. It could be any country in the world. To determine which specific country she wishes to visit, more information is needed. The sentence simply states that she wants to visit a country with beautiful scenery, but it does not provide enough details to identify the exact country she is referring to.