All participants are required to show a valid passport on entrance to Turkey. Citizens of some countries are required to obtain a visa before arrival and some may obtain it at the airport upon arrival. The most updated visa information can be received from the website of the Republic of Turkey Ministry of Foreign Affairs. (http://www.mfa.gov.tr/visa-information-for-foreigners.en.mfa) For further information please contact the nearest Turkish Embassy or Consulate to check the visa regulations.