What do these signs on the map represent and where can I find relevant information

[许大胆儿]

[Suty]

@许大胆儿 Hello, these are included in our background map, which we get from Mapy.com. There is no explanation in our app, but we can talk about some geographical objects in nature.

[许大胆儿]

@Suty Thanks.
I compared some regional pictures online. From the comparison, the moon might represent a cliff and the gray fragments might represent crushed stones.

I'll go to the website address that you mentioned to check the relevant information