|A virtual cache is a cache that exists in a form of a location. Depending on the cache "hider," a virtual cache could be to answer a question about a location, an interesting spot, a task, etc. The reward for these caches is the location itself and sharing information about your visit.
Because of the nature of these geocaches, you must actually visit the location and acquire the coordinates there before you can post. In addition, although many locations are interesting, a virtual cache should be out of the ordinary enough to warrant logging a visit.
Virtuals are now considered waymarks on Waymarking.com.