Get ready to explore one of the most gruesome historical sites in the United Kingdom, none other than the Tower of London! Built in the 10th century, the Tower has long been a constant part of London history and is now a UNESCO World Heritage Site. It has been used to house royals, a prison, and is now a museum with the English Crown Jewels on exhibit. The oldest tower, the White Tower, also houses Henry VIII's armor. You can also go on a guided tour with the Yeoman Warders, who have guarded the Tower for centuries, and listen to them tell exciting tales of the Tower's history.