This is the 6463rd most frequent Japanese word.
スリランカ
Sri Lanka
In this sentence, "スリランカ" is used to refer to the country Sri Lanka as the subject of the sentence.
スリランカは美しい島国です。
Sri Lanka is a beautiful island country.
Here, "スリランカ" acts as the object of the verb "訪れました" (visited), indicating the place that was visited.
私は去年スリランカを訪れました。
I visited Sri Lanka last year.
The phrase "スリランカ料理" combines "スリランカ" (Sri Lanka) with "料理" (cuisine), denoting food specifically from Sri Lanka.