Generate a question about the following movie plot: In Spain 1519, two con artists, Tulio and Miguel, win a map to the legendary City of Gold, El Dorado, in a rigged gambling match. After their con is discovered, the two evade capture and hide aboard one of the ships to be led by Hernan Cortes to the New World. During the trip, they are caught as stowaways and imprisoned, but manage to break free and take a rowboat with the help of Cortes' horse, Altivo. Later, they land on an unknown shore at the edge of Mexico, and Miguel begins to recognize landmarks from the map, leading them to a totem marker near a large waterfall. Believing it to be a dead end, they suddenly encounter a native woman being chased by guards; when the guards see Tulio and Miguel riding Altivo as depicted on the totem, they escort them to a secret entrance behind the falls, along with the woman, and into a city truly made of gold, El Dorado. They are brought to the city's elders, kind-hearted Chief Tannabok and wicked high priest Tzekel-Kan. Tzekel-Kan, seeking to seize the city from Tannabok, insists that the two, mistaken as gods, demonstrate their powers. Tulio and Miguel bicker between themselves, while a nearby volcano begins to erupt. When Tulio yells at Miguel to stop pestering him, the volcano suddenly stops erupting, and the citizens take this as proof of their godhood. Celebrations are held, and the pair are given luxurious quarters to stay, along with charge of the woman, Chel. Chel is aware the two are conning the people but promises to remain quiet if they take her with them when they leave the city. The two are showered with gifts of gold from Tannabok, but disapproves Tzekel-Kan in sacrificing a civilian as the gods' ritual. Tulio convinces Tannabok to build them a vessel that will allow them to leave the city with all the gifts they've been given, which will take three days. Miguel explores the city, allowing Chel to get romantically close to Tulio. Miguel comes to appreciate the peaceful life that the citizens seem to enjoy, and joins in with some of their activities....
The answer to this question is:
What does Tulio convince Tannabok to do?