North-west corner of my house

I'm trying to get a feeling for the newly-acquired visual aspect of the north-west corner of my house, so that I'll know how to best handle the various operations that will be facing me as soon as the warm weather arrives. Here's a rough sketch of the basic ideas I have in mind:

That's to say, I would build a carport, 3 meters wide and 6 meters long. The roof of this carport would join up with a new roof over the small stone structure (a former pigpen) that juts out from the façade on the left. The empty inside space at the far end of the carport would be used to store my firewood, and a staircase would lead down from there into the main house.

To take the following photo, which looks down onto the start of the new ramp, I climbed up the slopes behind the house:

Here's a side view of the old pigpen as it exists today:

And here's a view of the place under the present roof that I'll be using to store my firewood:

The total surface of the new ramp is quite large, and only the upper half of that area will be used for the carport. The total area of the ramp will be covered in pale gravel.

Finally, here's an unexpected feature of this corner of the house: an intriguing hole into the hill!

In fact, it's the entrance of a horizontal tunnel, about 20 meters long, which ends abruptly in a vertical wall of earth. It appears to be an ancient construction, and I've never found any obvious traces of the place where all the excavated earth might have been placed. Most people who try to imagine the reason why this tunnel was dug evoke the idea of a farmer (winegrower?) hoping to find water. But that idea doesn't add up, because there has always been an ample supply of spring water a hundred yards further up the road. Besides, at the place where the tunnel has been dug, there are no visible indications whatsoever suggesting the presence of subterranean water. The interior of the tunnel is perfectly tidy, and devoid of vegetation, as if it were dug quite recently. I prefer to imagine that the tunnel was dug as a hiding-place for wine-making tools and equipment, or maybe for stocks of wine in small casks or bottles. When would the owner of Gamone have wanted to hide such stuff? And from whom? I believe that a plausible answer is provided by events that took place long ago at Choranche. One of the rare books mentioning the history of Choranche, written by the Abbé Jean Morin, states that Carthusian monks acquired their first vineyard in this commune in the year 1381. Then, in the 16th century, the Royans region was the scene of bloody conflicts between Catholics and Protestants. Here is my translation of a paragraph from the book by Abbé Morin:

At the end of the wars of religion, in 1593, a former prior of our Chartreux monastery wrote that "the grapevines of Choranche have been cut down and ruined, and the cellars demolished, by the adepts of the reformed religion who lodged their garrison here".

I have always imagined—without being able to prove my beliefs in this domain—that the wine cellar at the heart of my house was built during that century of the so-called Wars of Religion, because it resembles a similar construction of that epoch that still exists today in the ruins of the Carthusian monastery at Bouvantes. So, I believe that the mysterious hole behind my house could have been a hiding-place for the possessions of the vineyard, which was dug rapidly at some time during the devastating Protestant raids of the 16th century.