Top 10 Things to Do in Copenhagen

1. Nyhavn: Iconic 17th-century harbor, colorful townhouses, canal tours, outdoor dining.
2. Tivoli Gardens: World's 2nd-oldest amusement park (1843). Rides, gardens, concerts, fireworks, Nimb hotel.
3. Canal Boat Tour: See Opera House, Black Diamond, Christianshavn, Freetown Christiania from water.
4. Little Mermaid Statue: Langelinie promenade. Small but iconic (H.C. Andersen).
5. Amalienborg Palace: Royal residence. Changing of the Guard (12:00). Museum in Christian VIII's Palace.
6. Christiansborg Palace: Parliament, PM Office, Supreme Court. Tower (free, best view), ruins, tapestries.
7. Rosenborg Castle Gardens: Renaissance castle, crown jewels, manicured park—picnic favorite.
8. National Museum of Denmark: Viking to modern. Golden Horns, Sun Chariot, Egtved Girl.
9. Louisiana Museum of Modern Art: 35 km north. World-class modern art, sculpture park, Øresund views.
10. Food Scene: Noma (3★, book months ahead), Geranium (3★), street food (Reffen, Torvehallerne), smørrebrød (Schønnemann), New Nordic everywhere.

Bonus: Bike rental (city of cyclists), Christiania (self-governing commune), Designmuseum, Glyptotek, day trip to Kronborg (Hamlet's castle) or Roskilde (Viking ships).