The helipad on the roof of the Grande Arche de la Defense.

A view from the roof of the Grande Arche de la Defense.

One of the underground cathedrals of city's Defense, so called because the vacuum is very large. Before the attacks of September 11, 2001, the underground were opened in the Heritage Days. Since then, all visits are canceled

An exhibition of paintings in the abandoned museum of the great arch of La Défense.

From the roof of the great arch, a view overlooking the CNIT and the Esplanade de la defense.

A beautiful panorama from the roof of the Grande Arche de la Defense.

On the roof of the Grande Arche at La Defense, Puteaux.

The wind tunnel crawl of the defense.