The world's largest country, whose capital is reportedly home to more billionaires per capita than anywhere else on Earth, how much do you know about Russia?

As well as providing drainage channels for surface water and habitats for a diverse range of creatures, rivers boast some truly amazing scenery. Test your knowledge of the world's rivers with our multiple choice questions.

Hawaii is a volcanic archipelago in the central Pacific Ocean, known for its beautiful beaches, laid back lifestyle and legendary surf. How much do you know about the Aloha state?

The US is the third largest and third most populous country in the world; its geographical and cultural diversity make it a popular destination for tourists. How much do you know about the ‘Land of the Free’..?