El Caballito is the popular name of a large modern sculpture in Mexico City by Sebastián, whose real name is Enrique Carbajal. It stands near Paseo de la Reforma and is known for its bright color and geometric style.

This is exactly the kind of monument that can appear in study-guide trivia because it connects a famous public sculpture with a famous Mexican sculptor. Sebastián is especially known for monumental geometric works, so the creator is often the most testable detail.