GPS stands for Global Positioning System is a system whereby satellites orbit the Earth broadcasting signals to the relevant receivers. These receivers can then process this information and determine where they are. Walkers use these to help them plan routes and stay safe and on-track. Read our guide if you're baffled.

Walking shoes can be expensive, and there are certainly a lot available. If you're feeling bemused, try our buyers guide to make sure you don't pick up a pair of winkle-pickers.