There’s so many attractions to choose from in London, but you’ll find one site at the top of almost every visitor’s buckelist—the Tower of London. This impressive structure is both a UNESCO Heritage Site and the most complete example of an 11th century fortress palace remaining in all of Europe. There’s a LOT to see and do in the Tower, from admiring the legendary Crown Jewels to learning about the Tower’s more sordid past as a prison and execution site. So if you want to make the most of your limited time, here’s everything you need to know about visiting the Tower of London.