Frederiksborg Castle in Hillerød, Denmark, represents the largest Renaissance complex in the Nordic region, built by King Christian IV between 1600 and 1620 on three islands within Castle Lake. The palatial complex features two grand garden designs: a Baroque garden from the 1720s characterized by formal geometry and royal monograms, and a romantic landscape garden with winding streams and the idyllic Bathhouse Castle from the 1580s. After a devastating fire in 1859, the castle was meticulously reconstructed based on historical plans, reopening in 1882 as the Danish Museum of National History. Today it houses Denmark's largest collection of portrait paintings and sits approximately 35 minutes by train from Copenhagen, drawing visitors to explore its magnificent Renaissance architecture and artistic treasures.