> A point of interest, or POI, is a specific point location that someone
> may find useful or interesting.
> ...
> The term is widely used in cartography, especially in electronic
> variants including GIS, and GPS navigation software. In this context
> the synonym *waypoint* is common.
 -- [Wikipedia][1]

As well as having a position (i.e., coordinates), a POI will usually have some of the following: a name, a code/description, or some quantitative measures related to the application domain.
  [1]: http://en.wikipedia.org/wiki/Point_of_interest