Yes, London. You know: fish, chips, cup ‘o tea, bad food, worse weather, Mary Poppins… London! (movie quote) Noisy, vibrant and multicultural, London is one of the largest cities in the world with a population of 8 million people. It is a leading global city of culture, fashion, finance, politics and trade and remains one of the most visited city by international tourists in the world. The city contains many famous landmarks and getting around is easy. The famous London Underground, also known as the Tube, is one of the most extensive subway networks in the world. An overview of the top tourist attractions in London.