The Occupation Museum (Besættelsesmuseet)

Few museums carry their subject in their very walls the way the Occupation Museum does. It occupies Aarhus's old town hall, a building that from the autumn of 1944 until the liberation in May 1945 served as the regional headquarters of the Gestapo, the Nazi secret police. To walk through it is to stand where interrogations, imprisonment and torture actually happened, and the museum uses that terrible authenticity with restraint and care rather than sensationalism.

The exhibition tells the story of the five years of German occupation as it was lived in Denmark's second city. It begins with the shock of 9 April 1940, when German forces crossed the border and the country was overrun in hours, and follows the slow hardening of everyday life: rationing and blackout, collaboration and its temptations, and the gradual growth of a resistance movement that turned to sabotage, an underground press and the smuggling of information and people. Personal objects, photographs, forged papers, weapons and film footage give the abstraction of "occupation" specific human faces – ordinary citizens forced into impossible choices.

The emotional centre of the museum lies below ground. In the basement, the original cells where the Gestapo held prisoners have been preserved, cramped and bare, their walls still marked by those who were locked inside. Standing in them is the museum's most affecting moment, and the displays around them tell the stories of individual resistance members, informers and victims without flinching from the moral complexity of the period, including the fate of those who collaborated and the reckoning that followed liberation.

Run as part of Den Gamle By, Aarhus's celebrated open-air museum, the Occupation Museum is professionally curated and well labelled in Danish and English, with guided tours that add depth for those who want it. It does not take long – around an hour and a quarter is typical – but it lingers in the mind far longer, and it makes an important counterweight to the lighter pleasures of the city.

Practically, the location could hardly be more central: the museum sits in the very heart of Aarhus, a few steps from the cathedral and the main shopping streets, making it easy to fold into any city itinerary. It is an ideal indoor stop on a wet day. The main galleries are wheelchair accessible, though the historic basement cells have limited access; staff are happy to advise. Admission is modest and free for under-18s, and older children and teenagers, especially those studying the war, find it genuinely powerful. In a country that remembers the occupation with unusual seriousness, this is one of the places where that memory is kept most honestly and most close to the ground.