Ours included keeping caravans and no satellite dishes on the front of the house.
Isn't there a map with the deeds with arrows on it to show which boundary is each properties responsibility?
Was the house built in 1970 (looks like it) and are there other houses next to you that were built at the same time? If so, it looks to me like a standard covenant to prevent purchasers from doing something to the property that would prevent the builders from selling the other houses. We had...