Himmelbjerget was believed to be the highest natural point in Denmark until 1847, when a larger scientific survey revealed the nearby Møllehøj to be the highest, at 170.86 m. However, when it comes to the size of the slope and the topographical prominence (aka peak factor), Himmelbjerget is much more impressive than Møllehøj: There is a height difference of 121 m from lake Julsø below to the top of the hill, which is remarkable by Danish standards. An amusing detail is the sign to the boat at the peak.