Question / Suggestion for the southeast corner of my farm

[Freizeitfarmer]

At the very southeast of the farm there is a small lake in a sink (zoom out to see it). I couldn't find a way to reach that. So if there is a way maybe someone has a hint...

Otherwise it would be cool to add a small story to it.
Generally I like to find secret doorways. So it would be cool to have some (more) in the game... I think there could be some connections between the caves, the sewerage and maybe the canyon.

 

[imnvs]

What farm map? Screenshot?

 

[Freizeitfarmer]

What farm map? Screenshot?

Main map, see in attachment lower right red mark.

BTW: also the ledge on the left side could contain a secret door.. wouldn't this be cool!?