Overview
Completed in 1663, this pentagonal star-shaped fortress remains one of Northern Europe's best-preserved citadels and is still partly used by the Danish military today. Inside its moats and ramparts stand a windmill, a church, the commandant's residence, and old guardhouses, while the broad lawns and paths are a favorite spot for locals to relax. It sits right next to the Little Mermaid statue, making them easy to combine — a full loop around the ramparts takes about 30 minutes. Free to visit.
Travel Tips
Combine your visit with a walk to the Little Mermaid statue nearby. Walking along the top of the ramparts offers nice harbor views.
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🇰🇷 Tips for Korean Travelers
Practical info for Korean travelers heading to Copenhagen, Denmark from Seoul (ICN).
Korean Passport · Visa
Check visa rules for Denmark on the Korean MOFA travel advisory site before flying — visa-free, visa-on-arrival or e-visa rules change often. Keep at least 6 months of passport validity.
Flight from Incheon (ICN)
Compare direct and connecting flights from Incheon (ICN) to Copenhagen on Skyscanner or Google Flights. Early-morning departures from Korea are usually the cheapest option.
KRW ↔ Local Currency
Check the live FX widget above for the latest KRW rate. Korean travel cards like Travel Wallet, Hana EZ and Toss FX offer free local ATM withdrawals and competitive rates.
Korean Community · Korean Food
Many cities have an active Korean community in Copenhagen with Korean restaurants, mini-marts, and Korean-speaking guides. Search Naver Cafe or KakaoTalk open chats for "Copenhagen 한인" before you go.
Attractions near Kastellet
Tap a pin on the map to jump to that attraction.
Copenhagen Opera House
A striking modern opera house on Holmen island, opened in 2005.
📍 1.2km away
Rosenborg Castle
A 17th-century Renaissance castle housing the Danish crown jewels.
📍 1.4km away
Freetown Christiania
A unique self-governing freetown brimming with art and alternative culture.
📍 1.9km away
Things to Do in Copenhagen
Copenhagen Canal Cruise
1-hour canal tour from Nyhavn covering the Little Mermaid, Opera House, Christiansborg Palace and more. About DKK 105 (EUR 15)
Copenhagen Bike Tour
Explore Copenhagen like a local on a 3-hour guided bike tour through major sights and hidden neighborhoods. About DKK 350 (EUR 47)
Tivoli Gardens All-Day Pass
Entry + unlimited rides at Tivoli Gardens. Enjoy the fairy-tale atmosphere with 110,000 lights at night. All-day pass about DKK 405 (EUR 55)