Sønderborg is a town in the Region of Southern Denmark in Denmark. It is the administrative center of Snderborg Municipality and the municipality's principal town. The town has a population of 27,434 (1 January 2014), and it is part of a municipality with a population of 75,264.
Sønderborg is within a short distance from Billund, Denmark's largest city. Billund is a must-see city because of its top attractions such as Legoland, Lalandia, and Givskud Zoo. Set about 1 to 2 days to explore Sønderborg. You'll want to come back for more!