Who did contestants have to perform in front of in order to receive their next clue ?
Airdate : November 1 , 2009 Dubai ( Dubai International Airport ) to Amsterdam , The Netherlands ( Amsterdam Airport Schiphol ) Afsluitdijk ( Cornelis Lely Monument ) Groningen ( Martinitoren ) Vierhuizen , De Marne ( Windmill De Onderneming ) Zoutkamp ( Harbor ) In this leg 's Roadblock , one team member had to climb to the top of the Martinitoren and count all of the bells in the carillon .