The borderless region known as the Schengen area includes the following countries: Austria, Belgium, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Italy, Latvia, Lithuania, Luxembourg, Malta, The Netherlands, Norway, Poland, Portugal, Slovakia, Slovenia, Spain and Sweden. All these countries issue a standard Schengen visa that has a multiple entry option that allows the holder to travel freely within the borders of all. Non-EEA travellers to Greece must hold visible means of support. It is also recommended for non-EEA members to hold return/onward tickets. If arriving with a one-way ticket, passengers may be asked for proof of sufficient funds for the return/onward journey. Passports, other than EEA passports, must be valid for at least three months after period of stay, or three months after the expiry of the visa. Visitors requiring a visa are also required to have medical insurance.