It will take 1.5-2 hours to complete depending on your speed but the idea is you take your time and enjoy the sites and linked information. There are 21 stages including the final - but don't let that deter you as many of the stages are in very close proximity.
There are simple questions at each stage which the correct response will take you to the next stage and brief directions to each stage have also been added to keep you on track!
Click here for link to the Wherigo cartridge's page
If you have not done a Wherigo cache before then don't be afraid to give it a go!....to get started you only need either a compatible GPS or a smartphone with a wherigo app installed.The Wherigo app is easy to download to your phone just like any other app. Once you have downloaded your wherigo app and logged in using your usual geocaching username and password then you just need to find this cache page. You could search for it by its title or GC number.You will then need to download the cartridge and will be given a drop down box to which you will probably choose 'Pocket PC Device'. You'll then be ready to go!
Good Luck and enjoy the Tour!- any problems getting started please let me know and I'll do my best to help.
Many thanks to Phil for technical support & Chris for being the road test guinea pig