You can get to Helsingør in North Sealand by ferry from Helsingborg in Sweden. But there are also local ferries in North Sealand. The little ferry that sails from Rørvig to Hundested and connects North Sealand and the Danish Rivera with Odsherred as well as the small summer ferry Columbus that sails from Kulhuse (Hornsherred) to Sølager (Hundested) All the ferries include bikes and cars.
All ferry routes.