While it's impossible to definitively measure the length of Britain's coastline because of the different methods used, we do know that millions of us visit it every year.
But not all countries have one. Did you know 44 countries are landlocked?
In this BBC Bitesize geography quiz, you'll be asked a series of questions to test your knowledge of them. Will you coast through the challenge? Good luck!
This article was published in August 2024 and updated in July 2026.
