Ponderosa Ranch "Bonanza" episodes were shot at the theme park's Virginia City site, although the town was prominently featured in three "Bonanza" television movies. Because the movies showcased the next generation of Cartwrights, they began circa 1905. The Ponderosa park expanded beyond the buggy era to include an exhibit featuring antique cars. It was a fledgling endeavor as tourists wanted to see horses flanked by Cartwright saddles. The idea for the theme park came about in 1965. Bill and Joyce Anderson owned a small horse ranch, which is located in about the same area as the fictional Ponderosa on the burning map.
Movie ranch evenly split between movies and television episodes, were filmed at the ranch during its peak years. The long-running TV western "The Virginian" filmed on location at Iverson in the ranch's later period, as did "Bonanza" and "Gunsmoke." By the 1960s, the ownership of the ranch was split between two of Karl and Augusta's sons, with Joe Iverson, an African safari hunter married to Iva Iverson, owning the southern half of the ranch (the Lower Iverson) and Aaron Iverson, a farmer married to Bessie Iverson, owning the northern half (the Upper Iverson). In the mid-1960s the state of California began construction