Parked of on the roadside intending to clamber up onto Gragareth and along to Great Coum, then back and over Whernside. Noticed Yordas Cave on the map, so being inquisitive, and having a suitalble torch and clothing, went back to have a look. You just need to switch on the torch, slip off your pack, bend down and go into the hole. You’ll be amazed that it is so easy to enter such a large cave and not have to crawl, get muddy, risk drowning etc. Go on. Have a look.