Exploring Copenhagen's historical districts and landmarks is a wonderful way to experience the city's rich heritage. Indre By, with its old buildings and narrow streets, offers a glimpse into the city's past. Christianshavn's canals and the unique "free city" of Christiania provide an interesting contrast. Don't forget to visit the Osterbro district with Castellet Citadel and the vibrant Vesterbro area with its cafes and bars.
Nyhavn, known for its colorful atmosphere, is a must-visit spot. And, of course, seeing the iconic Little Mermaid sculpture at the harbor entrance is a must-do activity, accessible via suburban trains.
Amalienborg Palace is a royal gem, where you can witness the changing of the guard ceremony around noon. It's a city filled with history and culture waiting to be explored!