Australian, British, Canadian, US, and EU citizens do not need visas for a trip to French Guiana as a tourist and providing you have proof of a return ticket, you can stay in the territory for up to three months. You must possess yellow fever vaccination certificate and your passport must be valid for at least three months post-travel. No other shots are required, athough protection against endemic diseases is always ideal.
If you are planning to visit the French Guiana, you should definitely know something about its weather. That way you will have the appropriate clothing.
The official currency is the Euro. French Guiana is the most expensive among all South American countries. Traveling to French Guiana’s interiors is expensive, so plan your trip. The budget traveler would find it hard to get by with less than US$55 a day.