French Guiana

The visa policy of French Guiana (and other French overseas territories) differs quite a lot per nationality.

Visa policy of Overseas France
Visa-free access to:

All territories, unlimited period

All territories, up to 3 months

All territories; most up to 3 months, one up to 15 days on organized trips

All territories; some up to 3 months, some up to 15 days

Most territories, up to 3 months

Some territories, up to 3 months

Some territories, up to 15 days on organized trips

Source: Wikipedia.