In both mobile and PC versions of the game, several Scandinavian locations must be completed before gaining access to Luxor again. In mobile, after completing Fjordheim Bridge, an Egyptian icon appears to the right of your Scandinavian town. Once clicked, you're back in Luxor.
@gamemaster said that Luxor icon is always present in the map section on the right hand side. when playing on the PC:
When in town there is no selection.