Where does white horses live?
There are several reasons why a horse may appear white.
True albino does not exist in the horse.
Most 'white' horses are actually grey.
Some are a paint or pinto pattern called sabino white and another called extensive overo or medicine hat, a medicine hat will be born with some colour on its ears and possibly its chest but this can fade with age.
Few spot appaloosa's can appear to be all white.
Cremello and Perlino appear to be white or cream but are actually double dilute chestnut or bay/black
And finally there is dominant white where the horse is white, the skin is pink but the eyes are normal colour. Dominant white is very rare and is not albino.
Given all these factors white horses can appear in almost any breed, anywhere in the world.