Here’s an interesting report by Cornelius Holtorf on the phenomenon of INCAVATION: making a hole to put artifacts in, for future excavation.
As one can see in is last slide, that reunites several examples of the practice, this is not only an artistic phenomenon but also an achaeological and educational one. 

Check the website at: 

And for an example that I always refer to:

French archaeologists dig up 1983 picnic table in the