Make sure your documentation is in order before departure. A passport valid for 6 months after your return is required for US citizens traveling to any Latin American country. Visas are not required for US citizens entering Belize, Costa Rica, Ecuador, Guyana, or Panama. Visas ARE required for US citizens entering Brazil, Kenya, and Tanzania. Visas should be obtained prior to departure. Persons without valid visas are not allowed to enter Brazil and are not allowed to purchase them upon arrival. It's possible but inconvenient to obtain visas upon arrival in Kenya and Tanzania. If you are not a US citizen, check visa requirements of the destination country as soon as possible. Participants are solely responsible for ensuring all necessary travel documents are in order.