Unspunnen Castle

Unspunnen Castle is a ruined medieval fortress in the municipality of Wilderswil, in the Bernese Highlands of Switzerland. Its weathered walls stand on a hill above Interlaken, making it an easy, rewarding short outing for anyone staying between Lake Thun and Lake Brienz.

What is Unspunnen Castle?

It is a castle in ruins, built around the turn of the 12th and 13th centuries. Its oldest element was a round tower, linked to the Lords of Rothenfluh. Over time, residential wings and ring walls were added, forming a compact but well-defended stronghold above the valley.

What is the history of the castle?

In 1398 the city of Bern sold the castle to the von Scharnachthal family. The new owners carried out major renovations in 1425, turning the fortress into a more comfortable residence. Bern took the castle back in 1515 but did not maintain it. It lost its governor, and its walls became a quarry for local builders. By 1533 the castle had finally become a ruin.

What can you see today?

The walls of the central round tower still stand, along with sections of the ring walls and two residential wings. This is not a large complex with interiors to tour. Instead, it is an atmospheric ruin that shows the layout of a medieval stronghold well, with views over the valley and the town below.

Why does the site matter to the Swiss?

On the meadow below the ruins, the first Unspunnen festival was held in 1805. It took place in the period after the Helvetic Republic, intended to reconcile town and country, patricians and peasants. Since then the festival has returned at intervals and remains a symbol of Swiss folk traditions. That gives the castle cultural significance beyond its architecture.

How to plan a visit

The ruins sit very close to Interlaken, so they combine easily with other sights in the region. One or two hours is usually enough for a relaxed walk, a look around the walls and some photos. Choose a clear day, because the views are among the best reasons to come. The site is open and needs no special preparation, though comfortable shoes help on uneven paths.

Frequently asked questions

Where is Unspunnen Castle? In the municipality of Wilderswil, canton of Bern, close to Interlaken.

When was it built? Around the turn of the 12th and 13th centuries; sources give slightly different dates within that period.

When did it become a ruin? In 1533, after Bern regained it in 1515 and let it fall into neglect.

Is there a festival connected to the castle? Yes, the first Unspunnen festival was held at its foot in 1805.

What remains of the building? The walls of the round tower, parts of the ring walls and two residential wings.