Buckingham Palace

Worth it if you're after the ceremonial pomp and actual palace interiors rather than just gawping at gates—the 4.4 rating from nearly 60k reviews suggests most people find their money's worth. Book a guided tour rather than going solo; you'll cut through the tourist clutter and actually understand what you're looking at, and the 659 Viator options mean you can find something that fits your pace and budget.

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