Travelers to northern Spain shouldn't miss a chance to experience the region's natural beauty. On this daylong tour from Santander, visitors are whisked to the Picos de Europa mountains, and Hermida Gorge. After a mountaintop photo opportunity, explore El Soplao Cave, and marvel at its natural rock formations. Along the way, visit a small village—Potes—and stop at a monastery housing the Lignum Crucis. Rejuvenate during the busy day with a traditional lunch, included in the tour price.