Also on these boards
Rosenborg Castle, This is an iconic tourist attraction in Copenhagen. It has monarchy, jewels, castle and gardens. The visit inside the castle is worthwhile. The explanations are provided via QR codes, which I think is very modern and should be encouraged.
Rosenborg Castle is a renaissance castle located in Copenhagen, Denmark. The castle was originally built as a country summerhouse in 1606 and is an example of Christian IV‘s many architectural projects. It was built in the Dutch Renaissance style, typical of Danish buildings during this period, and has been expanded several times, finally evolving into its present condition by the year 1624.