Arc de Triomphe
To reach the biggest triumphal arc in the world, commissioned by Napolean in 1806, at the end of the Champs-Elysées, make sure you take the underground passage instead of attempting to cross through traffic in the busy roundabout.
Once at the arc's center take an elevator or climb the staircase to the arc's top to see an exhibition hall filled with lithographs and photos of the arc through history. The Arc de Triomphe honors those who fought and died for France in the French Revolutionary and the Napoleonic Wars.
Napolean's remains passed underneath the arc on the way to his tomb and since then it has been a focal point for state funerals. The names of all French victories and generals are inscribed on its inner and outer surfaces. Beneath its vault lies the Tomb of the Unknown Soldier from World War I. The observation deck is open until late. After taking in the views of the lit-up city, descend the elevator and proceed to the nearest metro.
At the end of the Champs-Elysees in 16th arrondissement on Paris's Right Bank
Hours: April - September 10am - 11pm, October - March 10am - 10:30pm
Admission: Adult €8, Students 18-25 €5, Children and students up to age 17 free
NOTE: According to the website, "the top can ONLY be reached by climbing up its 40 stairs. But before you get to the stairs, you have to get to the monument itself (which isn't as simple as you'd think). DO NOT TRY CROSSING THE TRAFFIC CIRCLE! There is an underground tunnel on the Avenue de la Grande Armee side of the circle. You can access this tunnel from the Wagram exit of the Metro."