Austria, at the heart of Europe, is perhaps best known for its dramatic alpine scenery and classical music heritage. Test your knowledge of this beautiful, landlocked nation with our multiple choice questions...

It's estimated that more than 80% of the Earth's surface is volcanic in origin. Test your knowledge of volcanoes with these multiple choice questions.

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?