Discover a history older than the United States—by tens of thousands of years. On this private tour, your local guide brings you to the Altamira Museum, home to a breathtaking replica of the UNESCO‑listed cave. Gaze upon ancient bison and deer painted over 20,000 years ago, and learn the secrets of Ice Age artists. Then step into Santillana del Mar, a medieval Old Town where Romanesque churches and noble palaces line cobblestone lanes....