Where there are borders, there are usually also passages. However, researchers at Danewerk have for a long time searched in vain for such a breakthrough. From early documents, it was known, that there must have been a gate, called Wiglesdor. But the exact spot, where the kings and merchants in the old days used to cross the border from Southern to Northern countries was not found. It was not until 2010, that the famed "Gateway to the North" was uncovered. An archaeological sensation, as this approximately six-meter-wide passage through the Viking fortifications was located under a tavern. Only when the inn was demolished did the researchers discover the gate passage, which was already built in the 7th century, or maybe even earlier, at the exact point, where the Ox Road crossed the fortifications. For a lengthy period of time, this gate had been the only land border crossing between Central Europe and Scandinavia.