According to the article, "Hidden Lives and Hidden Rooms." By Scholars Martin Nitram, Corpus Corpus, and Evie Lee Stimbus, Bogdal is the largest known magical country, and the only one with a pure magical population.
This is because Bogdal is located deep inside Hogwarts, where all time and space and sense of location starts to fade away, and the extra dimensional nature of Hogwarts comes into play.
Thousands of classrooms, halls, corridors are populated by all kinds of magical beings, from free elves to rebelling goblins to wizards and more. And not just that, it has been said that Bogdal is a strange land which pulls in all sorts of lost, aimless, and oppressed souls throughout the multiverse to its warmth.
The people of Bogdal are kind, warm, comforting, but still fierce and strong.
The relations between Hogwarts and Bogdal are strong, especially during Dumbledore's time as Headmaster, as he had a free invitation to Bogdal, and acted as an ambassador for the Ministry. He was responsible for furthering magical education, giving free education to Bogdalans, and becoming a general Messianic figure to those people.