Start with the Huntington Library, Art Museum, and Botanical Gardens for extensive plantings, galleries and visitor parking that accommodate day visitors arriving by RV. Lacy Park is a nearby green space with shaded loops and small parking areas that are convenient for a short stop. Drive through the San Marino Historic District to see period architecture and tree-lined avenues that are pleasant to cruise at a leisurely pace. For longer drives, Interstate 210 offers multi-lane travel, frequent services and truck-friendly shoulders that make highway travel comfortable for larger rigs.