Visa & Passport
Everyone will need a visa except citizens of Switzerland and Israel.
Visas can be single entry or multiple entry, but multiple entry is recommended more than single entry. Multiple entry visas usually last a year, whereas the single entry last three months. They cost $150 and take two days to process. If you are from a country without a CAR embassy (such as New Zealand), you may apply for a CAR visa at a French consulate/embassy. It is unclear if other nationals (citizens of the USA, France, etc.) may apply at a French consulate or not. Policies for obtaining a visa vary among CAR embassies and from month-to-month. You may apply for a CAR visa at CAR embassies in neighboring Yaounde, N'Djamena, Brazzaville, Kinshasa, & Khartoum. The CAR also has embassies in Washington, Paris, & Bonn.
Borders with Chad, Sudan, South Sudan, and the Democratic Republic of the Congo (at least east of Bangui) are very insecure and any attempt to travel across them by land is not recommended. There is no land routes between the CAR and Congo-Brazzaville (Republic of the Congo).