In the recent re–run of Alistair Cooke's TV series ‘America’, one of the most intriguing programmes was that on the pioneers trekking westwards from the Mississippi to California. Their journey took only four months. Today's tourist can fly the same distance in a little over two hours. The pioneers saw the geological marvels close at hand but few knew enough to appreciate them. The airborne tourist may know enough but can't see them. How does one overcome this problem? By an educational tour with a leader who knows the co