Christiansborg PalaceThe seat of the Danish parliament on the islet of Slotsholmen, with royal reception rooms and a tower you can ride up for free for one of the best views in the city. The underground ruins beneath the palace are interesting for older children. Free under 18.
NyhavnThe well-known canal lined with brightly painted townhouses and old wooden ships, where Hans Christian Andersen once lived. Good for an ice cream, watching the boats and starting a canal tour. Free to wander and stroller-friendly.
FreeOutdoor space
The Little MermaidThe small bronze statue of Hans Christian Andersen's mermaid on a rock by the harbour, and one of Copenhagen's best-known landmarks. A quick photo stop (smaller than many expect) on a waterfront walk near Amalienborg. Free.