Things weren’t going well. Here’s a technical tip for you: if you decide to take your desktop Mac with you on holiday, and opt for the cordless keyboard and mouse, first check that you haven’t switched off Bluetooth. Logging into a Mac without a keyboard is problematic. I won’t bore you with the details, but the solution involved buying a USB keyboard and borrowing a USB mouse. It was on our way back from the shop that we found the Mané Kerioned dolmens.

They are by a main road, on a rise nearly surrounded (as so much is in this part of Brittany) by beautiful pine forest. Two of the dolmens are on the surface, their covering tumuli having disappeared. They have that massive, Flintstone-like quality: although never intended to be seen this way, they have a wonderfully sculptural solidity that tempts you into reading significance into the form. This is a mistake, of course. They are like that for practical, structural reasons.

A squeal of delight told me that Trish had discovered something interesting. It was the third dolmen, which is still underground. I joined her in the small burial chamber, its roof so low that Trish (at 5ft 1.5in tall) could only just stand near-upright in one spot - in all other places she had to crouch. What had delighted her was finding carvings on a number of the stones. Indeed, there is something about these engraved surfaces that adds a special dimension to the monuments. They are like a message, a direct connection between us and the people who felt compelled to grind them into the stones’ surfaces several thousand years ago. Inside the dolmen, you could forget about the nearby road and slip back those many millennia.

Zola wasn’t impressed. He’s our breton spaniel, a profoundly bolshy and uppity hound who would normally be scampering all over the place. But he seemed reluctant to enter the dolmen - Trish found herself dragging him inside. We didn’t think much about it … until a day or two later.

We had the site pretty much to ourselves - something that would be repeated throughout the trip and another good reason for going out of season. We were also impressed by the easy access to these sites. Mané Kerioned is regarded as one of the best megalithic sites in the region, certainly among the best of the dolmens. Yet there is no fence, no fee, no permission required.

In the afternoon, we decided on a quick tour of the Quiberon peninsula (Presqu’île de Quiberon). The object of the trip wasn’t strictly megalithic - just general sightseeing. We found a few menhirs along the way, of course, usually near the road and therefore enjoying all the auspicious atmosphere of a fire hydrant. But worth documenting all the same.

We also came across some derelict German blockhouses from the Second World War. These are littered all over this coastline (much of which remains in military use). They reminded me of the ancient monuments we had come here to see: although their function is known, unlike standing stones, they sit there with the same kind of monumental imperviousness.

My good friend Doug Selway is an artist who has produced some striking work - painting and printmaking - based on the military constructions at Orford Ness. Thinking about his work and seeing these monolithic relics made me decide to start a companion project to my photos of ancient sites - working title, ‘Modern Megaliths’. These images will be posted on my professional photography website.

This is what started it. A spur-of-the-moment visit to this passage grave rekindled my fascination with megalithic sites.

A friend told me about it. “It’s in a really beautiful spot,” he said. He was right.

From Brecé, we’d had to navigate increasingly narrow roads down a series of shallow valleys. You park the car in a wide spot in the road and walk 50m down a lane created by two bocage hedges, then skirt a small wood. The tomb appears suddenly, nestled into the edge of this wood, almost as if carved into the land. Passing through the entrance you find a chamber that crosses the entrance passageway to make a T-shape. This chamber is perhaps 5-6m long in total.

A sign at the site dates the tomb to 2400 BCE.

The site is better enjoyed from the outside, though. It somehow makes the woodland feel ancient and profoundly peaceful.