Glossary - Types
There is more than one kind of geocache. Some geocachers like to try finding some of each kind, other specialize. Here's a listing of the terms used to describe each type of cache. The definitions refer to the way in which these types are illustrated on the geocaching.com site listings pages.

Traditional

Shown as a single box on the description page. The coordinates should lead you right to a single container and its treasures.

Multi

Shown as a set of boxes on the description page. The coordinates should lead you to the first container. That container will likely have coordinates to another container. There may be several containers in the set, each one giving you the coordinates of the next. Eventually you will find the final container and its treasures.

Puzzle

Shown as a question mark on the description page. Perhaps the most devious and difficult version of a geocache. The published coordinates do not represent the location of the cache. Instead the description will be some kind of puzzle or code from which you will have to deduce the coordinates by solving the puzzle or decoding the message. Once you think you know the coordinates you can set out on your geosearch. But, there's always the chance that your solution was wrong. This type of cache presents the ultimate in mental challenges.

Virtual

Shown as a ghost on the description page. The coordinates take you to a location where there is something to be observed. There are no containers and no goodies to swap. Instead there will be something to see. It may be a beautiful view or something that can be only seen at this location. To prove you've found this kind of cache you often need to find some data posted at the site or take a picture of yourself and your GPS at the site then send the proof to the creator of the cache site. This kind of cache can be an interesting and memorable adventure.