The sand that once measured time.

You take your shoes off earlier than you meant to. The sand at Dueodde does not behave the way sand normally behaves. It is closer to flour than to grit, it holds the shape of a foot cleanly, and it squeaks faintly with every step, a small dry sound that children notice before adults do. Ahead of you the water is clear enough to read the ripples on the seabed, and it stays shallow for so long that people wading out become small before they ever start swimming.

I had been told about the beach. Nobody told me about the forest behind it.

The forest was the surprise

Behind the dunes the ground changes within a few steps. Scots pines, low and bent by the wind off the Baltic, stand in loose ranks over a floor of moss, lichen and fallen cones. The light comes down in pieces. In the middle of the afternoon the resin warms and the whole wood smells of it, and that smell, more than any photograph, is what I brought home.

It is an easy forest to walk into and a difficult one to hurry through. Paths appear and dissolve. The moss holds sound the way carpet does, so you hear your own steps and very little else, and after ten minutes the impulse to check a phone quietly leaves. Something older takes its place. You start reading the ground, choosing a route by instinct rather than signage, going further than you planned.

The forest is not scenery here. It is engineering that happens to be beautiful.

Why the sand is like this

The beach is quartz ground down from Bornholm's own granite, and the grains are unusually fine and unusually even. That is not a local boast. The sand was once used in hourglasses, because it runs steadily and does not clog, and it is the reason this beach appears on lists of the finest in Europe.

The forest exists for the opposite reason. Sand that fine travels. The southern stretch was once open drifting dune, and pine, marram and lyme grass were planted across it to stop the sand moving inland. Everything behind the beach is a piece of long-term land management that has since become one of the better woods in Denmark to get lost in.

What the dunes do to adults

There is a stretch where the dunes run on without any obvious end and the sand is firm enough underfoot to move on properly. I ran. Not for exercise, and not because anyone suggested it. It was a body memory from being about eight years old and it worked exactly as it did then. It is difficult to stay serious on that much open sand. That is worth saying plainly, because it is the part left out of the guidebooks and it may be the best argument for coming.

Then you eat. Smoked fish from the island's smokehouses, still the anchor of the local kitchen, and an amount of local ice cream I am not going to defend. Bornholm makes a great deal of what it eats and sells, and buying from the people who made it is not a sustainability gesture here. It is simply how the island works.

The layer underneath

This is the thing that stayed with me. A forest was planted to hold the ground down, and within a century soldiers were using the same trees as cover for guns meant to face east across the Baltic. The guns were never installed. The concrete is still there, going green, pine needles collecting in the corners of it.

Bornholm has this quality throughout. The round churches inland were built as churches and as places to survive a raid. The island changed hands between Denmark and Sweden, and the islanders took it back themselves. It was bombed at the very end of the Second World War, after most of Europe had stopped, then occupied by Soviet forces for close to a year. None of that is visible from a beach towel. All of it is twenty minutes away by bicycle.

What I have not written down is which path to take from the eastern car park, or where the forest opens without warning onto the top of the dunes. That belongs to the walk, and to whoever is on it with you.