Pozo de Jacinto

Pozo de Jacinto ("Jacinto's Pit Cave") is a pit cave located at Jobos Beach in the northwestern side Puerto Rican municipality of Isabela on Puerto Rico Highway 466.
Folklore.
A story about a man named Jacinto is related to Pozo de Jacinto. In that Jacinto and his cow fell into the pit cave and drowned, if his name is called and mention of the cow is made, the ocean becomes furious and churns wildly, in response.