Eiffel Tower ticket costs vary wildly. Adults over the age of 25 willing to take the 704 stairs to the second floor pay 7 euros, those aged 12 to 24 years pay 5 euros, and children 4 to 11 pay 3 euros. Admission tickets with elevator access to the second floor cost 11 euros, 8.50 euros, and 4 euros, respectively. -huffpost.com
