Teams have gone to the wrong place, and production did not intervene. when teams have been kidnapped to the wrong city (Andre and Damon, TAR 3), production did intervene to get their release and return them to where they should have been.
In the former instance, it has led to teams being eliminated (David and Jeff, TAR 4) and and a second final three team in TAR 10, IIRC, went to the wrong airport in Paris and the flight they took have them several hours behind the other two teams.
Teams usually end up having to show ticket agents the route info, and that usually avoids going to the wrong country.
Only demonstrates why geography needs to be taught as part of a pre-college education.