The Argun Mosque is incredibly beautiful. Even the Grozny mosque doesn't make as strong an impression as this one. Especially if you've already been to the Blue Mosque in Istanbul.

But it's unclear how much a mosque for 15,000 people is really needed in a city with a population of 40,000. It seems to me they could have done a more modest project.

PS. They say Shali is also very beautiful, but I won't make it there.