Billund is a small town built around LEGO: LEGOLAND, LEGO House and the Lalandia indoor water park sit within a few kilometres of each other. Two park days plus LEGO House is plenty; use a car for Viking, zoo and North Sea day trips, which lie roughly 15-70 km away in a straight line.
Parent tip: LEGOLAND is seasonal and its next-year calendar is published late in the year, so confirm dates before booking flights.
The original LEGOLAND, built around Miniland's brick models, with gentle rides for preschoolers and a few bigger coasters for older children.
Hands-on LEGO building centre in Billund town with four colour-coded Experience Zones, the brand's history and a free public square.
Indoor tropical water park beside LEGOLAND, useful on cold or rainy days; it belongs to a holiday-home resort but sells day-visitor tickets.
Safari-style zoo where you drive a route through large enclosures (including lions) and walk the rest, east of Billund near Vejle.
Large outdoor tree-top and forest play park on the edge of Billund built for climbing, running and imaginative play.
National Museum visitor centre beside the UNESCO-listed Jelling runestones and burial mounds, telling the story of the first Danish kings.
Open-air reconstructed Viking town and farm with costumed staff, farm animals and a child-height "Little Midgard" area.
Denmark's oldest cathedral in Denmark's oldest town; older children can climb the Commoners' Tower for views over the marsh.
Restored royal castle in Kolding with a dress-up workshop for trying on historical costumes and a tall tower with a view.
Free hands-on climate and nature science centre in central Vejle, a good rainy-day stop.