A really cool way to access the Arc de Triomphe is passing through les Champs Elysées avenue. This way you can visit multiple major landmarks in one day as you walk up the avenue.
The Arc is located in the centre of Place Charles de Gaulle roundabout. The 'best' way to access for a closer view is by taking the underground tunnel. The underground passage allows to cross the two extremities of the roundabout.
To our surprise, we noticed people trying to cross the roundabout by foot and recommend that you don’t try the same.
Once you arrive, you have two options; you can go around and take some pictures for Free (which is what we did) or can pay to climb the 286 steps. There must be a great view of Paris, this we cannot confirm. The entrance fee also gives you access to a small Museum telling a little about the History of the monument. Enjoy !
In sum, the Arc is worth a closer view for sure. Whether you want to pay for a closer view is completely up to you !