Rønde sits unusually high above the surrounding countryside, with views opening southwards across Kalø Vig and towards the hills of Mols. The town itself is quite small, but its position makes it an excellent gateway to Mols Bjerge National Park and to one of the most fascinating medieval sites we encountered in Denmark.
We stopped by the coast just outside Rønde, where the landscape is completely different from the town above. At the entrance to the parking area there was a distinctive green nature-reserve marker and a reminder that dogs must be kept on a lead. The setting beside the shallow waters of Kalø Vig was peaceful and felt much more remote than its proximity to Rønde would suggest.
The obvious historical landmark here is Kalø Castle. Reaching it is part of the experience: the castle stands on its own small peninsula and is approached along an original medieval stone road across the water. Remarkably, this is regarded as the longest surviving medieval road in Denmark.
The story behind the castle is considerably darker than its beautiful setting suggests. King Erik Menved ordered Kalø built after crushing a major Jutland peasant rebellion in 1313. It was one of several so-called coercion castles intended not primarily to defend Denmark against a foreign enemy, but to keep the king’s own rebellious subjects under control. The very farmers who had rebelled were forced to help build the fortress overlooking them.
Even the awkward stone road formed part of the defences. Anyone approaching by land was channelled onto the narrow causeway before reaching successive defensive lines of palisades, ditches, a drawbridge and the castle walls. What today makes for a picturesque walk was deliberately designed to make an attacking force extremely vulnerable.
Kalø also held one particularly extraordinary prisoner. Gustav Vasa was imprisoned here in 1518–1519 during the conflicts between Denmark and Sweden. He escaped, returned to Sweden and eventually led the rebellion against Danish rule before becoming King Gustav I of Sweden. In other words, a man imprisoned in this small Danish castle went on to establish the royal dynasty that helped shape modern Sweden.
The castle gradually lost its purpose after the introduction of absolute monarchy in Denmark in 1660. Parts of it were subsequently dismantled, and its building materials were reused elsewhere. Some of the old stones even travelled all the way to Copenhagen, where they were used in the construction of Charlottenborg Palace.
The wider landscape is just as interesting. The steep rise from Kalø Vig towards Rønde is the work of the last Ice Age: the terrain here can climb by more than 100 metres within roughly a kilometre. From higher parts of Rønde, the bay, castle peninsula and Mols hills below therefore appear almost like a natural amphitheatre.
Nearby Hestehave and Ringelmose forests add several more layers of history. Hestehave contains a Neolithic long barrow dating from roughly 4000–2800 BC, while Ringelmose has an old holy spring whose water was traditionally believed to cure eye diseases – but supposedly only if collected on Walpurgis Night.
This made Rønde much more than a simple stop on the road south. Within a very small area we found a quiet coast, an Ice Age landscape, prehistoric monuments and the remains of a fortress built to suppress a medieval rebellion – a fortress from which a future king of Sweden once managed to escape.