Easements are either continuous or discontinuous, apparent or non-apparent.
A continuous easement is one whose enjoyment is, or may be, continual without the act of man.
A discontinuous easement is one that needs the act of man for its enjoyment. An apparent easement is one the existence of which is shown by some permanent sign which, upon careful inspection by a competent person, would be visible to him.
A non-apparent easement is one that has no such sign. Illustrations
This is a continuous easement.