As standing witnesses to the ancient Stone Age human habitation of the area, granite barrows, dolmens and passage graves used for burials of chieftains, can be seen throughout the landscape. The well-preserved burial mound of Stabelhøje (lit: Stack-hills), dates to the Bronze Age. The castle ruins in the southwest of the park area, are the remains of the old and once important Kalø Castle. It is situated strategically on the small island of Kalø and the route to the castle ruins includes a stretch of medieval road on a cobblestone embankment. The marina of Nappedam is located in the cove east of the embankment and on the shores of the mainland lie the Kalø woodlands of Hestehave and Ringelmose. Hestehave Wood presents opportunities for bird-watching and the Stone Age (Funnelbeaker culture) long barrow of Store Stenhøj. The coastal cliffs at Hestehave Wood supplied the clay for bricks, when Kalø Castle was built in the early 14th century and the forest here was probably planted later on in the 1500-1600s. Further inland, the former manor of Kalø Gods from the early 18th century and the hunting lodge of Jagslottet designed by architect Hack Kampmann in 1898 can be found. Jagtslottet was originally owned by the German Jenisch-family who used it for summer retreats. The Jenisch was well-liked in the region apparently, but after WW II German property in Denmark was confiscated in order to pay an estimated compensation claim of DK 11.6 billion. Now the secretariat of the national park takes residence at Jagtslottet, while Kalø Gods is owned by the state and holds several schools and an environmental administration. The old farm of Strandkær in the middle of the park comprise the houses of Øvre and Nedre Strandkær (Upper and Lower Strandkær). Nedre Strandkær was built around 1730. The farmhouse now house the research activities on the national park and also functions as a training center for nature guides. Øvre Strandkær holds the Visitor Centre of the Danish Forest and Nature Agency. A trekking path leads from Strandkær through forests of pinewood and deciduous trees and across old grasslands pastures with grazing cattle. The protected landscape south and east of the Strandkær visitor centre has a high concentration of tumuli.