Climb Copenhagen’s Round Tower (Rundetaarn) and discover its unique spiral ramp, fascinating history, and the best panoramic views of the city.
The Round Tower (Rundetaarn) is one of Copenhagen’s most famous landmarks, offering some of the best views across the city. Built in the 17th century by King Christian IV as an observatory, it is unique because instead of a staircase, visitors climb to the top via a wide spiral ramp.
I discovered the Round Tower almost by accident, as it happened to be at the end of the street where my hotel was. It turned out to be one of the highlights of my trip. The climb was unusual but fun, and the views from the top were simply spectacular. If you are visiting Copenhagen, even for a short time on a cruise stop, this is an easy and worthwhile attraction to add to your itinerary.
A unique way to the top
The Round Tower was originally built as part of the University of Copenhagen’s observatory. Instead of stairs, it has a 4-metre-wide spiral ramp that winds around the tower’s core seven and a half times. This design sounds strange but it allowed heavy observatory equipment (and even horses and carts) to be taken to the top. So it makes perfect sense.
Today, it makes the climb gentle and accessible, with windows dotted along the way providing little previews of the view to come. Some windowsills even make handy resting spots if you want to pause or simply watch other visitors making their way up.
Read more | I’ve included the Round Tower as part of my 2-day Copenhagen itinerary, which also covers Nyhavn, Tivoli, Rosenborg Castle, and more.
Fun facts about the tower
- The spiral ramp is 268.5 metres long at the outer wall but only 85.5 metres near the core.
- It twists around the core seven and a half times
- The hollow core was once Denmark’s geographical zero point, used to measure surveys of the country.
- A reinforced glass platform lets you stand and look down into the hollow — not for the faint-hearted!
The Library Hall
Halfway up the tower you will find the Library Hall, which was home to the university library until 1861. These days it hosts art exhibitions, concerts, and cultural events. When I visited, there was a modern art exhibition taking place, and it made a nice break in the climb before continuing to the top.
The best view in Copenhagen
At the top of the tower, a narrow staircase leads you onto the outdoor observation deck. From here you get a sweeping 360-degree view over Copenhagen, with information plaques pointing out the landmarks. On a clear day, you can even see across the water to Sweden.
There is seating around the edge, so you can take your time soaking up the view. For me, standing here looking out across the rooftops was one of the most memorable parts of my trip.
Read more | Explore the top things to do in Copenhagen with my detailed 2-day itinerary covering must-see attractions, local highlights, and travel tips.
The observatory
The Round Tower is the oldest functioning observatory in Europe and is still used today by amateur astronomers. If you want to see the observatory itself, a narrow staircase leads further up from the observation deck. It is only open at certain times, so check ahead if this is something you would like to experience.
Practical information
- Location: Central Copenhagen, within walking distance of Strøget shopping street and many other attractions.
- Opening times: Open all year round except 24/25 December and 1 January.
- Tickets: Entry costs DKK 60 for adults.
- Time needed: Allow around an hour to climb, explore, and enjoy the view.
Visiting on a cruise stop
If you are visiting Copenhagen on a cruise, the Round Tower is a great option for a short port day. It is in the city centre, about 15–20 minutes from Oceankaj cruise terminal by shuttle bus or taxi. If your ship docks at Langelinie or Nordre Toldbod, you are even closer, and it is possible to walk. The climb itself does not take long, so you can easily combine it with other nearby highlights such as Nyhavn, Rosenborg Castle, or a canal tour.
The last word
The Round Tower is one of those attractions that is simple but memorable. The climb is fun, the history is fascinating, and the views from the top are some of the best in Copenhagen. Whether you are in the city for a weekend or just a few hours on a cruise, it is well worth adding to your itinerary. If you’re planning a short trip, take a look at my 2-day Copenhagen guide for a ready-made plan.
It only takes about an hour to visit, but for me it was one of the most enjoyable experiences of my trip and one I would happily do again.