There are many such excavations in Bukhara.The city is under the city.
It's worth a look. I often pass by these ruins, every time it attracts attention - this is the history of ancient Bukhara
A small area with excavations, you can find similar places between the Ark and the Mosque, where they have just started their activities and can not see everything so well. As a landmark, it is interesting for one time, especially when you realize that all this has been laid out and built again. But it's worth a look)