Old Town & Castle Square
Start at Castle Square before coach groups thicken: Royal Castle courtyards, then the rebuilt Market Square lanes. Boutique houses on Senatorska and New Town shorten this loop; capsule stays near the centre turn it into a metro-plus-walk morning.
Late light on the coloured façades is worth planning around. Keep one Old Town morning clean — leave the afternoon for the Vistula rather than stacking another museum.