This monastery, opened in 1991, is in a large walled-compound at the northern end of the central district. There is an active temple, and though visitors are welcome, photographs are not allowed inside. The 25 monks are very friendly.
Khar Uul. If you have time on your hands, locals recommend the two-to-three-hour hike out to Khar Uul (Black Mountains), south-west of town. Take lots of water - this is the Gobi, after all.