Usually the result of weathering and erosion, unique rock formations are found all over the world - sometimes in splendid isolation and sometimes creating spectacular landscapes that stretch for miles. Test your knowledge of some of the world’s most famous rocks with these multiple choice questions...

Think you know the Dinar from the Dirham? The Dollar from the Dong? Then test your knowledge of world currencies with these multiple choice questions...

How much do you know about the world's airports? Put your knowledge to the test with these multiple choice questions...

Rich in history and culture, Europe's capital cities are amongst the world's most visited destinations. Test your knowledge with these multiple choice questions.