At one end of line one of the metro in Paris you will reach a huge business area called la Defense. Maurice even had an office here when he worked with IBM which was the first time I ever visited this area. I got very lost-thank God for cell phones.
This is the main building there. It is also a sort of Arch de Triumph of the modern kind. You can take an elevator to the top but it’s quite a distance from central Paris and it is hard to see much there.
It lines up with the Arch de Triumph as you can see here in the distance. If you continue on in a straight line, you go down the Champs Elysees, to Place de la Concorde, and then on to the Pyramid of the Louvre.