virtual reality is a term applied to computer interfaces intended to provide the user the experience of being somewhere other than sitting in front of their computer. Where telepresence uses computer technology to allow a user to explore a real remote location, and possibly interact with real people there, virtual reality provides interaction with a digital destination.
Alternately, a real location, as in telepresence, could be enhanced, with the addition of digital artifacts. The game pokemon-go is an example of this kind of virtual reality. Users run an app on their phones that adds hidden treasures to be found while exploring real world locations. The hidden treasures are found at real world GPS locations, but only exist digitally.