From Cayenne, small planes operated by Air Guyane fly to various small towns deep in the jungle that can't easily be reached by road.
Tours often use river transport, but individuals can try to catch a boat at Kaw and St Laurent. Catamarans sail to the Îles du Salut from the town of Kourou.
French Guiana has a border crossing at St Georges, where the Oyapock River marks the frontier with Brazil, and at St Laurent, where the Maroni River is the border with Suriname. Crossings to Suriname are made by boat, while a brand new bridge to Brazil opened in 2017.
At The Border
Once across the bridge on the Brazilian side, you'll stamp into Brazil before continuing into town, from where daily buses (R$160, 11–14 hours, morning and afternoon) and planes leave Oiapoque for Macapá.
Getting to the Border
Minibuses leave when full from Cayenne to St Georges (€30, five hours), located on the border with Brazil. You may need to transfer buses in Regina. This is the only public-transport option to the border.
Car & Motorcycle
Although most roads are in good condition, some secondary and tertiary roads can be bad in the rainy season. Have a spare tire, and drive carefully: the roadsides of French Guiana are littered with car wrecks, a sobering argument against speeding. Traffic cameras are common along the main N1 road, so stick to the posted speed limits (90km/h is the national maximum), and be particularly careful between Cayenne and Kourou.
One serious issue is the incredible scarcity of gas stations in French Guiana. Be sure your tank is full when you leave St Laurent or Cayenne, and be aware that in small towns gas stations are normally only open in the mornings.
If you are traveling in a group, renting a car (from €35 per day) may actually save money. An International Driving Permit is not legally required, though you must be at least 21 years old to rent.
Taxis collectifs (minibuses) are the second-best wheeled option. They leave when full from Cayenne, Kourou, St Laurent and St Georges, and can often be arranged by tourist offices, which keep lists of reliable drivers.