Popsugar Living Travel Inspiration Cities to Visit in Your 20s 23 American Cities You Must Visit in Your 20s August 2, 2015 by Macy Cate Williams View On One Page Photo 18 of 23 ADVERTISEMENT () Start Slideshow Share This Link Copy ← Use Arrow Keys → 18 San Luis Obispo, CA This hidden getaway located in California is a great place to unwind. Lay out by the beach, go on a hike, or go wine tasting. Previous Next Start Slideshow Travel InspirationTravel