Undercroft Café

You're walking the castle grounds, maybe queuing for the State Apartments, and suddenly you realise you need caffeine. Head down into the vaulted stone undercroft and you'll find yourself in one of Windsor's most atmospheric cafés—literally underneath royal footsteps. The medieval arches and ancient stonework do most of the heavy lifting here; it's the sort of place where your cappuccino tastes better because the walls are 900 years old. It's not fancy, and the reviews suggest the food and service can be a bit hit-and-miss, but there's something undeniably special about grabbing a coffee in a genuine piece of Windsor's history rather than joining the crowds at the High Street chains.