When cycling along Cycling Route No. 33, which runs between Gilleleje and Hillerød, you’ll pass Søborg Castle Ruin.
Søborg Castle dates to the 1100s, when Archbishop Eskild erected the first castle on the site, a fortification enclosed by a ring wall and moat. The castle was one of Denmark’s largest and best-fortified strongholds in the Middle Ages and was occasionally used as a prison. Several kings have stayed at the castle for periods of time, and King Valdemar Atterdag’s daughter, Margrethe (later Queen Margrethe I of Denmark), was born at Søborg Castle. Located by the castle is a small market town, Søborg, whose large and monumental church from approx. 1180 is definitely worth a visit. It was constructed as a town church adjacent to Søborg Castle. The castle itself was originally located by Søborg Sø, a lake that was drained in 1872-96 when a canal to Gilleleje was excavated.
You can cycle to the castle ruin along Route 33 between Hillerød and Gilleleje. If arriving by car, there is a small carpark by Bygaden just outside the town of Søborg – a great destination for a picnic with family and friends. There are picnic tables and benches, BBQs and plenty of grass and boulders to sit on.