Theodor Geisel (aka Dr. Seuss) once wrote his popular children’s books atop Mount Soledad in San Diego, California. From there, he could see a single Monterey Cypress tree that sat within Ellen Browning Scripps Park in La Jolla, California. That tree is thought to have helped inspire The Lorax.
Source: io9 – Tree Believed to Have Inspired Dr. Seuss’s The Lorax Has Died