Congratulations to Kate Caveney for providing the correct answer to last week's travel trivia question. The seven rays on the Statue of Liberty's crown represent the seven continents.
Time to put on your thinking cap for another question. Las Vegas is a city of extremes, full of breathtaking man-made structures, and surrounded by some of nature's own amazing architecture.
Not only is the Stratosphere tower - featuring roller-coaster rides to be strictly avoided by the faint-hearted - one of the most exciting attractions along the Vegas strip, it's also the highest observation tower in the US. But just how tall is the Stratosphere tower?