Smoke, granite, and a castle on a rock.

You smell Allinge before you have properly arrived in it. Alder smoke, sweet and dense, coming off a chimney that has been doing the same job for well over a century. The smokehouse chimneys along this coast are the tallest things in the villages, taller than the churches in some places, and they are the reason the villages exist at all.

Herring built northern Bornholm. Not tourism, not the castle on the hill, not the painters who came later. Fish, salt, smoke, and the willingness to go out in weather that could kill you.

The smokehouse

Inside, the arrangement is unceremonious. A counter, a chalkboard, trays of fish that came out of the smoke that morning, and people eating at long tables without any performance about it. You take a plate. You are handed herring, and then you are largely left alone, which is the correct way to serve food that does not need help.

The smoking is done with alder wood, which burns cooler and sweeter than most, and the technique is old enough that the flavour is essentially a historical document. What you are tasting is a preservation method from a time before refrigeration, kept alive because it turned out to taste better than the thing that replaced it.

A preservation technique from before refrigeration, kept alive because it turned out to taste better than the thing that replaced it.

The harbour

Allinge's harbour is cut into granite rather than built out onto sand, which gives it a hardness the southern villages do not have. Yachts sit where fishing boats used to, and the working fleet is a fraction of what it was, but the shape of the place is unchanged. Stone, water, a few boats, and the same rock the island is made of coming up through everything.

The castle on the rock

Then you walk north, and the ground rises, and Hammershus appears the way it was designed to: all at once, from below, with no way of pretending it is not enormous.

It stands on a granite plateau seventy-four metres above the sea, and its fortifications cover something in the order of thirteen hectares. It is the largest castle ruin in Northern Europe. Standing under the walls, the first thought is not about architecture. It is about labour, and about how badly somebody wanted to hold this rock.

What it controlled was the sea. From here you can watch anything moving through the water around northern Bornholm, which in the medieval Baltic meant watching the trade that made people rich and the fleets that took it from them. The castle was a fortress, an administrative centre, a prison and a seat of power, and it changed hands repeatedly between the Archbishop of Lund, the Danish crown, the Hanseatic city of Lübeck and, briefly, Sweden.

Ruins are good for children

This surprised me and should not have. There are no ropes, no glass cases, and very little instruction. A child can walk through a gate that armies failed to get through, stand in a room that was a prison, and look down at the sea from a wall, all without anybody explaining why it matters. They work it out from the scale.

The ground is uneven and there are drops, so it is not somewhere to stop paying attention. But it is one of the rare historical sites that does not need a child to be quiet, still or interested in dates.

What I have not described is the walk between the harbour and the castle along the cliffs, or what the ruins look like in the last hour of light when the stone goes orange and the wind drops. Those belong to the walk. Go up in the evening, when the coaches have left.