The rules are simple. Each location contains a group of English language questions and audio reports. Your 'tour' will involve listening to these audio reports and answering correctly as many questions as possible. Once you have finished a location you can progress to the next one on your tour.
You have a limited amount of cash. With every wrong answer, you lose some cash, and if you lose it all you must start again!
http://www.bbc.co.uk/worldservice/learningenglish/quizzes/wheretonext/