Referring to Tax's example above, someone tripped on the footpath/pavement outside the back of my place.
We have a dual access place and the rear access is not one we use, but one all our neighbours use, through an easement to egress their homes.
An Elderly person tripped on the footpath/pavement and sued the Council.
The trip occurred where my driveway and the Council's footpath cross over.
A tree, not planted by me, on the Council verge, the roots had lifted the slab up maybe half an inch.
The local law says that the property owner is responsible for the land where the driveway egresses.
So, on land not owned by me through an event I didn't cause but, because of the Law, the responsibility falls to me.
Initially the Council directed me to completely re-lay the concrete driveway ... easily $3-4,000 but after negotiation, settled for me to dig up and re-lay THEIR footpath/pavement 
Cost was $1,200, and I had to get rid of the old footpath.
The Law is a complex beast.