Enormous blast crater

Here I continued work on the "Alien monument in hole" idea but anged the monument a little and added an enormous blast crater.
This idea is probably too literal, too huge scale and too figurative or whatver for the brief though.
The cross section view shows an interior layer.

Would be cool to change the 'gravity' or horizon when you enter the monument.
Then have structures and objects to interact with around the inside wall.
Like walking in a large scale hampster wheel...