You'll probably see Machala Cathedral from a distance before you actually find this important place of worship. Pop inside if it's open or just take in the facade from the street.
You'll soon discover why this Machala principal church is popular with travelers. If you're looking for other things to keep you busy, Estadio 9 de Mayo, and Juan Montalvo Park are in this area as well. They won't take you long to get to from Machala Cathedral.