If you in UB have the time, then visit here, can be visited in a day but best to have an overnight near by in a Ger camp, include time to visit the dunes near entrance of the park. The main reason to visit is to see the horses but there is so much else deer, squirrels, marmots, birds, all will probably make an appearance. They say the best time to visit is morning in evening when the horses are coming down to the wearing holes ot drink but you may see them at other times. Worth visiting the small information centre at the gate and you can arrange a guide. The park is big and has a couple of routes to be followed, most use the smaller route, that usually is good for seeing lots of wildlife.