Close by the other famous sinkhole Røverstuen, the huge sinkhole Hestegraven can be found. The two sinkholes are of the same type, and as well as Røverstuen, Hestegraven also has its own myth. The myth at Hestegraven claims that a couple of newly-weds drove through the area around midnight, and suddenly, the couple and their horse and carriage vanished into the deep. This tale is also known from elsewhere, and has become an urban legend. Another, maybe more believable, legend says that Hestegraven was used to hide horses from the Germans during the war in 1864, and the sinkhole has since then been called Hestegraven, which translated means the horse pit.
The feeling at Hestegraven is very special as you can experience surface water from the nearby lake, Lille Økssø, vanish into the deep of the sinkhole. If you go into the sinkhole, you can see the small water stream vanish into a crack. The sound you will experience will be as if water was falling into a well. However, tread carefully - exploring the sinkhole is at your own risk.