This might be the dreamiest train ride in the country.Aerial view of Amtrak's Pacific Surfrider along the coast.Credit: Oak City Drone/Adobe StockKey PointsAmtrak’s Pacific Surfliner is a scenic 351-mile coastal train route that travels from San Diego to San Luis Obispo.Riders can hop off in charming towns like Solana Beach, San Juan Capistrano, and Santa Barbara for dining, museums, beaches, and boutique hotels.With year-round beauty—whale migr…