
The Round Tower (Rundetårn)
Top pickIndre By
A 17th-century tower built by Christian IV as an astronomical observatory. A spiral ramp — no stairs — winds 7.5 turns to a platform with views over the old town.
The ramp is easy on the legs and the view is the best cheap panorama in the city.

Freetown Christiania
Top pickChristianshavn
A self-proclaimed autonomous commune founded in 1971 on abandoned military barracks, known for its alternative community and colorful homemade architecture.
Walk the ramparts and the lake path — the quiet side is the best part.

Rosenborg Castle
Top pickKing's Garden
A Renaissance castle built by Christian IV in the early 1600s. It houses the Danish crown jewels and royal regalia, and sits in the lovely Kongens Have park.

Copenhagen City Hall
Rådhuspladsen
The seat of the city council, opened in 1905 on the main square. It houses Jens Olsen’s World Clock, an astronomical clock with over 14,000 mechanical parts.

Amalienborg
Top pickFrederiksstaden
The residence of the Danish royal family: four identical rococo palaces arranged around an octagonal courtyard facing the harbour.
The changing of the guard happens daily at noon.
Frederik's Church (Marble Church)
Frederiksstaden
A rococo church directly opposite Amalienborg, crowned by the largest church dome in Scandinavia — inspired by St Peter’s Basilica in Rome.

Trinitatis Church
Indre By
A 17th-century church commissioned by Christian IV, forming one complex with the Round Tower and the old university library.

St Alban's Church
Churchillparken
Copenhagen’s Anglican “English Church”, built in the 1880s in Gothic Revival style next to the Gefion Fountain and the star-shaped Kastellet fortress.
Combine it with a walk around Kastellet — the fortress grounds are free to enter.
Skibene på Holmen
Nyholm, Holmen
Denmark’s floating Cold War museum: the frigate Peder Skram, a submarine and a missile boat moored at the old naval base — all open to board and explore.
Run by volunteers, so check opening days before you go.

Royal Danish Opera House
Holmen
The national opera house on the harbourfront, opened in 2005 — a giant neo-futurist building facing Amalienborg across the water.

Christiansborg Palace
Top pickSlotsholmen
The seat of the Danish Parliament, the Prime Minister’s Office and the Supreme Court — the only building in the world housing all three branches of a government.
The tower viewing platform is free and one of the best views in the city.

Ny Carlsberg Glyptotek
Top pickIndre By
An art museum founded by the Carlsberg brewing family, holding French sculpture, Egyptian antiquities and Danish Golden Age paintings around a palm-filled winter garden.
Free entry on the last Wednesday of each month.
Rådhusbiblioteket
Rådhuspladsen
Copenhagen’s central public library, sitting in the City Hall complex on the main square.
Danish Design Centre
Havneholmen
Denmark’s national design organisation, housed in the harbourfront BLOX building alongside the Danish Architecture Centre’s exhibitions.

Natural History Museum of Denmark
Botanical Garden
The national museum of natural history — zoology, geology and botany collections — located in and around the University of Copenhagen Botanical Garden.
Pair it with the Palm House next door.