Fan Casting The Road to El Dorado

In 1519 Spain, con-artists Miguel and Tulio win a map to the legendary City of Gold, El Dorado, in a rigged dice gamble (though they ironically win the map fairly after Tulio was given normal dice from one of the opponents). After their con is exposed, the two evade the guards and accidentally stow away on one of the ships to be led by conquistador Hernán Cortés for the New World. At sea, they are caught and imprisoned, but break free and steal a rowboat with the help of Cortés' mistreated horse, Altivo.