A real overland line through Costa Rica, from the Nicaraguan crossing at La Cruz to the Panama border at Paso Canoas. Built around what we actually drove, slept in, ate, and refueled at — Pacific NW down through Nicoya, ferry to the mainland, up to Arenal and Poás, east to the Caribbean, then south down the Pacific to the Osa Peninsula. 4x4 strongly recommended; some sections need it.