• Family trail with checkpoints through the castle, Fantastic Frederiksborg, made for kids from about 7, with extra detail in the Smartify app
• Hands off the exhibits, since paintings and furniture can't be touched, so kids need an adult alongside on the trail
• 15-minute walk from Hillerød Station, at the end of the S-train from central Copenhagen, along the lake or the main street

Frederiksborg Castle sits on three islets in Castle Lake. Christian IV built it in the early 1600s, and it is the largest Renaissance complex in the Nordic region. Inside, the Museum of National History tells 500 years of Danish history through Denmark's largest portrait collection.

Kids follow a family trail of checkpoints through the halls. Outside, a Baroque Garden with royal monograms cut into the hedges sits by the lake.