Stream now with KPBS+ / Watch Monday, Oct. 6, 2025 at 9:30 p.m. on KPBS TV. Dozens of buildings were part of the 1915 Exposition but only a handful were meant as permanent structures. Join Host Elsa Sevilla as she visits the historic Administrative Building where the architects, engineers and other staff worked from during the Expo's construction. Also, find out who is responsible for the idea of creating a Botanical Building in Balboa Park and more.