PACIFIC COAST HWY (LA TO SF)
This has to be in my top ten must do road trips in the U.S. I got to do a lot of it, but due to landslides (fire and rain), the section between Cambria and Monterey was closed in early summer 2017. The trip is around 500 miles one way from Los Angeles to San Francisco. Plenty to see along the way. I did it in 2 days, but could have easily enjoyed a full week or more. Definitely visit the Bixby Creek Bridge!