This is a must see in Balboa Park. The Spreckels pipe organ is an outdoor organ housed in the Spreckels Organ Pavilion. It is the second largest outdoor pipe organ in the world and this year it is one hundred years old. It was built in Balboa Park for the 1915 Panama-California Exposition. Free concerts are held every Sunday afternoon at 2 p.m. The concerts are wonderful. Don't miss it if you are in the area.