This is the 2051st most frequent Russian word.
венгрия
Hungary (a country in Central Europe).
Here 'Венгрия' is the subject of the sentence, referring to the country by its name in nominative case.
Венгрия — это страна в Центральной Европе.
Hungary is a country in Central Europe.
In this sentence, 'Венгрию' is in the accusative case, as it is the direct object of the verb 'посетили' (visited).
Мы посетили Венгрию прошлым летом.
We visited Hungary last summer.
The word 'Венгрии' is in the genitive case, showing possession (the beauty belonging to Hungary).