-- Open minded attitude and a smile — Passport valid for at least 6 months after return of trip — Binoculars — A good, comfortable pair of broken - in walking shoes and socks (5 + pair)-- A pair of shoes for restaurants (loafers, sandals, etc). (singlestravelintl.com)
To enter Costa Rica, you will need a U.S. passport valid for 6 additional months after the date of your arrival into Costa Rica. (caravan.com)
To enter Guatemala, you will need a U.S. passport valid for 6 additional months after the date of your arrival into Guatemala. (caravan.com)