At bowling alley at Nundle I came across an open shaft (no fence)about a meter sq. Another point if out by oneself, tell someone of your plans ok. Then if you change them when out there ,we should always write our changes on a piece of paper &leave in the car. When we had our property in C. Qld. I was home by myself &had an accident when galloping my horse,he put his front leg into a hidden hole,I finished with a dislocated collarbone,2 miles from the landrover(the horse ran away) &the landrover was 4 miles from the house. I had told my young brother who was away that I was going into another paddock. I made it a rule after that,if we changed our plan always leave a note in the landrover.