Buckingham Palace is the primary residence of the British monarch located in London, known as a setting for state occasions and hospitality that has been a focus during national events. The London Eye is the tallest Ferris wheel in Europe and most popular paid tourist attraction in the UK, visited by over 3.5 million people yearly. Big Ben is the nickname for the great bell within the Palace of Westminster clock tower in London. Tower Bridge is a bascule and suspension bridge over the River Thames in London near the Tower of London, known as an iconic symbol of the city.