Odense include the Radisson SAS HC Andersen Hotel, the First Hotel Grand with its brasserie bar, the 68-room Old English-style Clarion Collection Hotel Plaza, City Hotel, which is in close proximity to the Hans Christian Andersen museum, and the 140-room Danhostel Odense City. Nonnebakken, a hill in the Odense area, is the site of one of Denmark's six former Viking ring castles, built during the reign of Sweyn Forkbeard, who had forced his father Harold Bluetooth to leave the country and seek refuge by the Jomsvikings in Wollin (modern Poland) in around 975. The fort provided its occupier the command of
Odense which comprises the Danish Route 9. Other, smaller routes connect Odense to the rest of Funen, with direct links to all coastal towns. In 2015 plannings were established on Denmarks first Diverging diamond interchange (DDI), called "Dynamisk Ruderanlæg", upgrading the diamond interchange number 52 on Fynske Motorvej (E20), crossing the roadways of Assesvej by following the US-american design of DDIs at On 17 September 2017, the redesigned interchange opened for traffic. Computer aided simulation and land usage resulted the DDI as the adequate solution. Odense is served by Odense Airport, which operates flights to tourist resorts, mainly in the summer