There are no valleys to cross or mountains to climb, but you will need them to solve the puzzle below.
The recommended way of tackling this puzzle is to print-out the images (with the whole of each image on a single page). However, if you have basic image-editing software (e.g. Windows Paint) and rudimentary image-editing skills you can solve the puzzle on the computer.
You can check your answer to the puzzle here.
While there is a well-defined path to the cache, the cache is about 10 metres off.