Rold Skov is not flat, which in Denmark is worth saying. The terrain rolls hard enough to drive an unusual concentration of springs: Ravnkilde, Gravlevkilden, Egebækkilden, and Lille Blåkilde, whose name means 'little blue spring' and which pushes out roughly 90 litres a second — a rate that makes the diminutive look like a joke. That water fills a chain of lakes across the woods. Madum Sø is the largest and the one people swim in; Store Økssø and Mossø sit deeper in the trees; Gravlev Sø, drained long ago, has been restored to open water. The forest takes its name from the village of Rold on its southern fringe, and other settlements — Arden, Skørping, Rebild — sit inside or against it. At its northern edge, the heather-covered slopes of Rebild Bakker open out of the trees.

Much of Rold Skov is planted conifer, and under conifer the forest floor is usually poor in species. The exception comes where chalk surfaces near ground level, and there the plant list turns remarkable: the rare lady's-slipper orchid growing alongside red helleborine, pennywort and wood anemone. Every orchid in Denmark is protected, and picking any of them is illegal. The fungi are the real headline. More than five thousand species have been recorded here and the count is still rising — edible mushrooms, the tinder fungus once used to carry fire, the beautiful and poisonous fly agaric, the deceptive bitter bolete, and the thing Danes call Troldsmør, troll butter, which is not really a fungus at all but the slime mould Fuligo septica, capable of creeping slowly across a log while you are not looking. Red deer and roe deer move through the woods, along with badger, fox, otter, stoat, squirrels and a great many bats.

East of Rebild, the abandoned limestone workings of Thingbæk Kalkminer run into the hillside. They have a second life as an underground art gallery, and a third as one of the country's more important winter roosts: five species of bat hibernate in the tunnels. Rebildcentret administers the mines along with museums and conservation work in the surrounding area. A short distance away, and far more deeply buried, sits Regan Vest — the bunker built during the Cold War to house the Danish government and monarch in the event of nuclear war. It was kept secret for decades, decommissioned in 2012, and opened to the public as a museum in 2023. A forest chosen for centuries by people who did not want to be found turned out to suit the state for exactly the same reason.

Three-quarters of Rold Skov is privately held, mostly under the manors of Lindenborg, Nørlund and Willestrup; the Danish state owns and manages the remainder. That split makes the forest a patchwork of management styles rather than a single unified holding, which is part of why it retains such varied habitat. The whole complex forms Natura 2000 site 18 — Rold Skov, Lindenborg Ådal og Madum Sø — with status as both an EU habitat area and a Ramsar wetland of international importance. South of Skørping, the Jyske Skovhave has been quietly accumulating trees since 1886, an open arboretum of Northern Hemisphere species that reads as a nineteenth-century catalogue you can walk through. At 8,000 hectares — a little under 20,000 acres — Rold Skov is Denmark's second-largest contiguous forest, behind only the woods around Silkeborg.