Boller Slotspark surrounds the former Boller estate southeast of Horsens, with paths, old trees, and a calm setting near the fjord. The manor itself is not the main reason to come; the appeal is the landscaped parkland and the sense of an old Danish estate on the edge of town.
It works well as a low-key walking stop, especially if you are exploring the Horsens Fjord side of the city. The park adds greenery and local history without requiring a long excursion.