I should have known the Harz would have the last laugh when I set off in late November with nothing but a summer jacket and misplaced optimism. The sat-nav had been cheerfully insistent that Thale was "mostly flat," which I now realise was a relative term employed by someone who has clearly never driven through the northern Harz foothills with a boot full of overpacked luggage and a passenger who gets carsick on anything steeper than a supermarket ramp.

The mishap, because there is always one, came roughly three miles from the property. I had stopped to photograph what I insisted was a "charming misty valley" and what my partner correctly identified as "just fog, you absolute plum." In my enthusiasm, I managed to lock the keys in the boot. There we stood, on a gravel lay-by somewhere between Quedlinburg and Thale, watching our breath cloud in the proper cold while I performed the traditional British ritual of pretending this was somehow not my fault. A local dog walker eventually took pity, phoned the property manager, and forty minutes later we were back on the road with my dignity in tatters and my partner's expression suggesting this holiday would require significant restorative cake.

Arriving at the Thale property in proper darkness, the season announced itself immediately. The wooden exterior was slick with recent rain, and the porch light cut through a mist that seemed to rise from the very ground like something from a Bronte novel. I had expected the Harz to be pretty; I had not expected it to feel so theatrically autumnal, as though the region had been waiting specifically for my inadequate jacket to make its point.

Inside, the seasonal influence was everything. The underfloor heating, which I would ordinarily dismiss as unnecessary luxury, became my new religion. The property's large windows, so promising in the brochure's summer photographs, now framed a blackness so complete I half-expected to see a Brocken spectre hovering in the garden. Instead, there was only the sound of rain on the terrace and the occasional distant bark of a dog that my imagination immediately upgraded to something more folkloric. This is the Harz in late autumn: it does not merely get dark, it performs darkness.

Morning brought the proper revelation. I woke to find the mist had not cleared but settled, transforming the familiar into something provisional and strange. The terrace, which I had navigated confidently the night before, now ended in grey nothingness. Trees emerged at odd angles, their bare branches still holding the occasional stubborn leaf. The Brocken itself was invisible, as it so often is at this time of year, though its presence was everywhere in the saturated air and the sense that the landscape was actively withholding something.

I made coffee and stood at those same windows, watching the slow business of a Harz November day beginning. The seasonal damp had turned the wooden decking dark; condensation ran down the glass in steady rivulets. Somewhere, presumably, there were hiking trails and viewpoints and all the active pursuits I had vaguely planned. They could wait. The weather had made other arrangements, and I found myself surprisingly content to let it.

My partner appeared, wrapped in the property's blanket like a particularly grumpy burrito, and we negotiated the thermostat in that married-person shorthand that passes for conversation before nine. The heating won, as it always does in November. We spent the morning in deliberate slowness: second coffee, third coffee, the gradual accumulation of local brochures we would never use, a walk to the edge of the property's grounds that lasted precisely seven minutes before the horizontal rain sent us retreating.

This is what I had not understood about the Harz in this season. It does not invite conquest. The summer visitor might stride from peak to peak, cataloguing views and accumulating photographs. The late-autumn guest learns different virtues: the particular pleasure of a warm room watched from within, the way mist simplifies a landscape into suggestion rather than fact, the honesty of weather that offers no compromise. My inadequate jacket hung dripping in the hallway, a reproach and a reminder that the Harz had been here long before my holiday plans and would remain long after, indifferent to both.

By afternoon, the light was already failing in that particular November way that feels less like sunset and more like the day simply giving up. We drove the short distance to Thale itself, found a bakery still open, ate Apfelstrudel in the car with the heaters blasting. The seasonal darkness had compressed the day into something precious and brief, each activity weighted with the knowledge that light was not guaranteed, that evening would come early and stay long.

Back at the property, we lit the fire that the description had mentioned almost as afterthought and which had become, in this weather, the absolute centre of the evening. The flames did what the underfloor heating could not: they transformed the room into something defended, a small territory of warmth and light against the pressing dark outside. I thought of all the summer holidays I had taken, the endless light, the obligation to be constantly doing, and recognised something I had missed in those years: the particular intimacy of a place and season that forces you inward, that makes the holiday less about acquisition and more about simple presence.

The mist never properly cleared that first day, nor the second. I stopped expecting it to. The Harz in late November teaches you this, if you let it: that not seeing everything is its own kind of experience, that weather is not obstacle but texture, that there is a profound relief in abandoning your itinerary to something larger and older than your plans. I still maintain the valley was charming, even in fog. Especially in fog. Though I did not mention this to my partner, who was enjoying her cake too much to reopen the argument.