Copenhagen

I spent about 1.5 days exploring Copenhagen. Copenhagen's main tourist attractions, aside from Kronborg Castle, seemed quite compact from the train station, so I bought a ticket with the intention of seeing everything in 24 hours. After purchasing the ticket, I was prompted to install an app, and I entered the number into the app to use it. A countdown began when I swiped to activate it. (Similar tickets exist in other countries as well.) At first, I was confused because there were no ticket gates on the train, but it seems that as long as the time on the ticket is moving when the ticket inspectors come around, it's fine. (They never came around during my visit.) The Little Mermaid and Nyhavn are located along the coast, so I went there first since they are further from the central station. From the central station, I took the subway about 5 stops and walked for about 20 minutes. I think you can approach them from either the Amalienborg Castle side or the Kastellet side along the way. Once you reach the coast, you can also use the card to ride the water buses (yellow?). The area near Nyhavn had the most tourists. Also, I couldn't enter the observatory. Furthermore, entry to Tivoli Gardens, located near the central station, is guaranteed. Attractions require separate tickets. (There were many elementary school students, like those on a school trip.) There are also many other attractive souvenir shops and tourist spots, and the townscape itself is picturesque, but it seemed that many places close at 6:00 PM. I recommend getting there early in the morning before things close.