This is the 6920th most frequent Russian word.
алтай
Altai: A mountain range in Central and East Asia, or the region surrounding it.
Here, 'Алтай' refers to a geographical location, specifically the Altai region in Russia.
Алтай — красивый регион России.
Altai is a beautiful region of Russia.
In this sentence, 'Алтай' represents a destination or place someone intends to visit, again being used as a proper noun to indicate the Altai region.
Я хочу посетить Алтай этим летом.
I want to visit Altai this summer.
Here, 'Алтай' is used possessively (Культура Алтая) to refer to the cultural attributes or practices of the Altai region.