In Denmark the very modern city Kolding is home to a 700 year old castle. Placed right in the city center, on a small hill, the castle gate and entrance leads you to what today serves as a museum. Opening hours is from 10 a.m. to 17 p.m.
Every night the light turns on in the top floors of the tower. Its up to you what might goes in the Castle tower late at night. I know one thing for sure, staying up there , you will be able to see the beautiful Danish summer sunset, just a few hours before midnight.