What you are looking at is Sempre em frente*, the adventurous tortoise we had about eight years ago. He is trying to escape the Inner Sanctum, his designated living space.
That hole, at the bottom of the wall served a practical purpose. During the Zimbabwean rainy season, it was the only place for the water to go. It ran in a forcible rivulet through the Inner Sanctum, and through a similar hole in the wall at the other end of the small walled garden.
I did admire his talent for the diagonal.
Perhaps he wanted to investigate the mulberry tree which had fallen down one weekend in our absence?
I had forgotten all about this adventure at dusk.
I was merely looking for an image to include in a post which was going to be on an entirely different topic. There is always tomorrow!
Allison
* “Sempre em frente” is a compulsory phrase all Portuguese have to include in a set of directions given to lost tourists. It means “straight ahead”, “keep going straight”, “always in front” – you get the idea.
That elusive pair of jeans 
Say something here!