Most visitors pop in to what amounts to the queen’s garage in about 15 minutes. You’ll see stables fit for a you-know-who (they barely smell at all) and Her Majesty’s Rolls-Royces (many of which, at Prince Charles’s behest, run on green fuels). You’ll also overdose on learning about regulations for when this set of harnesses may be used and when that leather must be polished. The Queen’s Gallery and the Mews can be seen on a joint ticket (£19 adults, £17 seniors and students, £10 children 5–16).