Running along the coast of California is one of the best-kept secrets for traveling to San Diego. The Pacific Surfliner is perhaps one of the most scenic train rides in the US, hugging the Pacific Ocean’s coastline. Operated by Amtrak, passengers can travel from Los Angeles to San Diego in about three hours while enjoying the scenic views. You’ll be amazed at how quickly the time flies when you’re watching the coastline transform in front of you. If you’re only planning to travel to San Diego from LA for an afternoon, the train provides you with the flexibility to do so. A ride on the Pacific Surfliner truly is a treat for anyone who wants to explore California.