If you want to visit one or more of the associated sites, and are not visiting the Acropolis, there are individual entry tickets for these six sites, all but the Ancient Agora cost 2â¬ â the agora is 4â¬.f you want to visit one or more of the associated sites, and are not visiting the Acropolis, there are individual entry tickets for these six sites, all but the Ancient Agora cost 2â¬ â the agora is 4â¬.
The online form replaces the onboard paper and customs entry requirements for all passport holders of visa waiver countries. Electronic Travel Authorization (ESTA) application forms became mandatory on January 12, 2009, to reinforce security. All travelers on business or holiday, from countries who previously were beneficiaries of the Visa Waiver Program (VWP) must now apply online and obtain an ESTA before their trip to the United States.
1 Starting on January 12, 2009 citizens from Visa Waiver countries must apply for ESTA (U.S. Travel Authorization) in order to be eligible for admittance into the United States.2  The ESTA Travel Authorization is valid for up to two years and can easily be updated for future visits. Citizens of one the 37 Visa Waiver Countries (including the Netherlands) entering the U.S. under the Visa Waiver Program should apply. 2  It is recommended to apply for ESTA at least 72 hours prior to departure.