London, the capital city of the United Kingdom, is one of the most significant cultural, financial, and political centers in the world.As one of the world's major global cities, London exerts a strong influence on world art, entertainment, fashion, commerce and finance, education, health care, media, science and technology, tourism, transport, and communications. London is still one of Europe's most economically powerful cities and it remains one of the major financial centres in the world. These are 20 things you must do when visiting london: 1.Explore Tower of London The Tower of London, with a storied history that spans over a millennium, stands as a profound symbol of royal power and national heritage. Initially commissioned by William the Conqueror in the 1070s, the Tower has served various roles: royal residence, treasury, mint, armory, and even a zoo. Its most famous function, perhaps, has been as a prison and site of execution for some of England's most notable h...