Fr Guyana is an overseas department of France, so as others have said the GDP is a bit higher, etc, but it is an illusion. The numbers are inflated due to high subsidies and sparse population. France and EU pump money in there because the European space station is there - b/c of proximity to the equator it is cheaper and easier to launch satellites into orbit. If you can get a tour there do it. One of the best side trips I have ever done was a all-day sail boat ride to the former Devil's Island prison colony where you can swim off the boat right to the islands and see where some famous people were failed - Papillon and Dreyfus. Really one of the most interesting things I have ever done and such a lovely trip out to the islands. Do it! Downside to Fr Guyana is it is unreasonably expensive, and Cayenne is the absolute most boring capital city I have ever been in on a Sat night in my entire life. After 45 mins we found one bar open and it was karaoke, so the night wasn't completely lost.