Karakorum

Karakorum has been the capital of Mongolia.
It still has a walled "city", in fact the remains of monasters. If you have a good sight, you can see the white squared walls below.

Entering this space brings you into quite a different world, with a different architecture.

Outside the walls are the merchants of the temples, where you can have your picture taken

This city is guarded by 4 tortoises. As in discworld?