This wonderful circle remains an absolute favourite, no matter how many other places I get to between our visits here. Its location offers a feeling of space and solitude, with views stretching away to the unmistakable Carn Kenidjack outcrop to the north. We rarely see anyone else here, although it's easy enough to get to. Tregeseal has somehow escaped the tourist trail that takes in Men-an-Tol, Lanyon Quoit and Merry Maidens.

The summer bracken is much lower than usual and the stones are surrounded by large numbers of (thankfully dry) cow pats. The cows themselves are not in evidence. I can't really say whether any of the stones are leaning more than in previous years. Although it's nice to see the stones without the depth of bracken, it still seems that other ways of achieving this are available. I desperately hope that sense is seen and that a solution can be found to the issues presented by the longhorn grazing. This place is far too special to be mired in controversy or surrounded by barbed wire.

We had seen this barrow across the field on an autumn walk a couple of years back, but never got any closer. It's not the most impressive of barrows, low and ploughed down. But it has the inevitable scooped depression in its top, indicating that excavation took place at some point.

Kenidjack Castle is one of several Iron Age cliff castles making use of the natural granite fastnesses of West Penwith. For some reason we have never been here before, despite walking this stretch of the coast path a decade ago. A small stile gives access to the headland itself, and then the rocky "spine" looms ahead. Approaching from the northeast, the most impressive part of the fort's defences is readily visible.

The neck of the headland was protected by a triple row of ramparts, dropping steeply from the spine before terminating abruptly at the edge of a near vertical cliff, above crashing seas. On the northern side, this triple rampart is very well preserved. The outer and middle ramparts are covered in vegetation, but protruding stones indicate that the construction uses granite blocks rather than earthen embankments. This is writ even clearer in the exposed inner rampart, the stones of which have been scattered into a fan shape. I pick my way down to get a closer look, discovering quickly that the footing is somewhat treacherous, as the grasses and succulent plants hide the position of potentially ankle-twisting stone blocks beneath.

At the bottom end of the ramparts, the drop off the cliff-edge is somewhat vertigo-inducing and I don't get too close. Heading further seawards, the remains of hut circles have been found, but I don't see anything of these in the area I cover. Instead I head back up onto the central rocky spine, where an easy scramble gives access to the sloping tip of the headland, facing westwards down to the sea below. This is a brilliant place, wild and desolate. Most of the visitors are of the avian variety. There is a real feeling of being at the edge of everything, especially as this really was the edge of everything for the Iron Age people who inhabited the headland.

Surrounded by spoil heaps and yet another chimney, the setting is still stunning. The hills of Bartinne and Chapel Carn Brea are the dominant features inland, while Land's End and the Longships beyond form the seaward backdrop. It's almost exactly ten years since my first visit here and I had forgotten what a brilliant monument this is. It's been heavily messed about with, exposing central spaces that were not originally there (the space between the collar and central mound). But it remains magnificent, huge and beautifully sited.

The entrance grave, set into the southern wall of the outer collar, is partially hidden by summer vegetation giving it a cool, leafy feel. It would be impressive in its own right, but here it simply serves to enhance the much larger mound above. Climbing over the outer collar, the well-preserved southern cist is set into the inside of the wall at almost the same position as the entrance grave is in the outside (see plan from info board). It is the only one of several original cists that retains its capstone, as the others went "missing" after Copeland Borlase excavated and exposed the inner workings of the mound. The circular space between the outer collar and the inner mound is not an original feature, having been inserted by Copeland Borlase to allow visitors to see the interior more easily. Walking around this narrow passage gives a great sense of the scale of construction, as the drystone walls are at head height on either side. Foxgloves grow in the light soil. At the northeastern part of this passage, a second cist can be seen, sadly now lacking its capstone. There is also an unexplained "pit" set into the outer collar on the east side. A climb over the wall of the inner mound gives access to the central chamber, with a deeper pit – a grave? – at its northern end. There were further cists here, but they have also gone now. Even without a roof, it's an intimate, enclosed feeling place, hidden away from view from outside.

We sit and enjoy the quiet for a while, as clouds form overhead. Eventually, we leave, heading back to nearby St Just along Carn Gloose Road. First fix of the holiday greatly enjoyed!