Skip-the-line entry to the Royal Palace and the Royal Collections Gallery, followed by a private walking tour through Madrid de los Austrias — the district that predates the palace by two dynasties.
Most Royal Palace visits stop at the last state room and send you back onto the street. This one continues into the Royal Collections Gallery, where the tapestries, carriages, and armor that explain how the Austrias and Bourbons actually governed are on permanent display, then walks out through Madrid de los Austrias — past the Almudena Cathedral and the courtyards the palace itself grew out of. Your guide moves with skip-the-line access at both sites, so the two hours inside are spent looking, not queuing.
By the walk's end, you'll have seen the dynasty that built Madrid and the city it built before them.