Great free mini museum! They even offer to conduct an excursion for free! There are only 2 halls, but there are many exhibits, ancient tools, jewelry, dishes, etc. There is a burial site, full of photos from the excavations. In general, you can and should go, it won't take much time!
I used to go there often, it's a good museum. Historical and Cultural reserve of the Mangystau region. The reserve was established in 1980 in order to preserve unique historical, architectural monuments and natural landscapes.