Dziani Dzaha Crater Lake

From all.net/iwar:

Like the United States and the English-speaking countries with close ties to it, France has over the past ten years set up a global interception network. Le Nouvel Observateur can confirm the existence -- and publish photos -- of three
other DGSE "satellite" tapping bases. One -- code-named "Fregate" -- is hidden in the Guyanese forest, at the heart of the Kourou space center. The other, completed in 1998, is attached to the side of the Dziani Dzaha crater on the French island of Mayotte in the Indian Ocean. Both are managed jointly with the BND (Bundesnachrichtendienst), the German
secret service. The third center is located in the western suburbs of Paris, on the Orgeval plateau, at Alluets-le-Roi. A total of about 30 antennas "cover" nearly the entire globe, with the exception of the
Siberian North and a part of the Pacific.

Also see www.conservatoire-du-littoral.fr.