You can find out about the history of Colan with a stop at San Lucas Church. While you're in the area, stroll along the beaches.
You can find out about the history of Piura with a trip to Armas Plaza. While in the area, you can find time to visit its shops.
Take a campus tour or just explore the area of National Universtiy of Piura, during your trip to Castilla. While in the area, you can find time to visit its shops.