Buy your tickets from 11 to 17€ for the Eiffel Tower. You can buy your tickets online, or the day of the visit directly at the Eiffel Tower. Free for children under 4. Book your tickets online for Eiffel Tower, Paris: See reviews, articles, and photos of Eiffel Tower, ranked No.2 on TripAdvisor among. On this day in , the Eiffel Tower was completed. It was the tallest structure in France until the construction of a military transmitter in the.