How to teach our 3.5 year old to be aware of his surroundings without taking away his fearlessness?

Our son has a tendency to walk, run, leap etc without checking his surroundings. He’ll fall and (most of the time) get up and keep going. We want him to continue being fearless but to teach him how to be more aware of his surroundings.We’re at the cottage and he’s fallen off the dock twice already (we got here yesterday).Looking for ways for him to just be more spatially aware, so he doesn’t injure himself. via /r/Parenting http://bit.ly/2NafzHo