Direct answer
Devil's Island (Île du Diable) — the small historic islet off the coast of French Guiana near Kourou — is accessible only by organized boat tours from Kourou and best visited with a guided tour; there are restrictions and minimal facilities.
Visa / entry requirements
Best time to visit
Safety tips
Local customs and etiquette
Currency and payments
Transportation and access
Must-know tips
Practical contacts and planning
Concise final advice
Plan a guided boat tour from Kourou during the dry season, bring cash, sun and insect protection, and be prepared for limited facilities. Respect the historic site, follow safety rules, and confirm visa requirements before travel.