Kastellet, Copenhagen Travel Guide

4.6 (2242)

A living star-shaped fortress blending Danish military history, scenic urban parkland, and tranquil harborside walks in central Copenhagen.

Kastellet is a remarkably preserved 17th-century star fortress near Østerbro, Copenhagen. Surrounded by lush ramparts and moats, the fortress is still an active military site yet freely open to the public for exploration. Wander its pentagram-shaped walls, visit historic barracks, admire the windmill and striking entry gates—all while absorbing layers of Danish history.

A brief summary to Kastellet

Gl. Hovedvagt, Kastellet 1, Copenhagen, København Ø, 2100, DK
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Monday 6 am-8 pm
Tuesday 6 am-8 pm
Wednesday 6 am-8 pm
Thursday 6 am-8 pm
Friday 6 am-8 pm
Saturday 6 am-8 pm
Sunday 6 am-8 pm

From Eve

Know before you go

Hi, I'm Eve. Here are a few practical things to know before exploring Kastellet.

Entrance is free; grounds are open daily from early morning until evening.
Don’t miss the distinctive windmill on the ramparts, a favorite photo spot.
Combine your visit with nearby sights like the Little Mermaid and the Museum of Danish Resistance.
The fortress is a popular jogging route; mornings are quieter and especially tranquil.
Most paths are paved and stroller-friendly, but some older cobblestones may be uneven.

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Explore Kastellet on the Map

A handpicked selection of must-see spots near Kastellet, mapped for you.

Getting There

Walking

From central Østerbro, a stroll through the leafy parkland and harborfront leads directly to Kastellet’s iconic gate. The star-shaped fort is a distinct landmark near the Little Mermaid and the Museum of Danish Resistance. Expect a walk of about 10–20 minutes, with benches and sculptures along the way.
Public Transport

Buses from central Østerbro run toward the park area by the harbor, with stops close to Kastellet’s moat. A single adult ticket costs 24 DKK (~€3.20). From the bus stop, the fortress’ red walls and main entry are clearly visible.
Taxi

A taxi ride from Østerbro’s main squares takes roughly 5–10 minutes, typically costing 80–120 DKK depending on traffic. Taxis can drop visitors near the main fortress entrance.
Driving/Parking

Limited street parking is available around the fortress, with municipal meters charging about 24–38 DKK per hour. Spaces fill quickly, especially during peak seasons.

Discover more about Kastellet

Kastellet, the “Citadel,” stands as one of Europe’s best-preserved star fortresses and a living testament to Denmark’s military legacy. Constructed beginning in 1626 and completed under King Frederik III in 1664, the fortress was designed to defend Copenhagen from naval threat and has witnessed centuries of Danish history, from Swedish sieges to Nazi occupation during World War II. Today, Kastellet retains its functional military purpose but opens its gates daily for visitors to stroll the ramparts, meander along tree-lined paths, and enjoy a tranquil oasis just steps from the city streets.As you wander the expansive, pentagonal bastions, you’ll encounter the iconic red barracks, a still-active church, powder magazine, prison, and the photogenic Kastellet windmill. Soldiers in historic dress occasionally march within the walls, and the grassy embankments evoke the fortress’ original defensive function. The site offers beautiful views over Copenhagen harbor and is beloved by locals as a jogging path and picnic spot. Interpretive plaques throughout the grounds reveal stories of wartime resilience, peace, and transformation.Kastellet is much more than a fortress—it's a vibrant urban park woven seamlessly into Copenhagen's daily life. Its calm moats attract herons and swans, while the green spaces burst with wildflowers in summer. The fortress is in the immediate orbit of other cultural treasures, including the Little Mermaid statue and Churchillparken. Entry is free, year-round, and the site is fully accessible during daylight hours, making it easy to experience a blend of living history, military grandeur, and peaceful Danish design.