Types of caches
A traditional cache is the most common type of geocache, described in what is geocaching. It is a container of some sort containing a logbook.
On geocaching.com, traditional caches are classified into 4 sizes:
- Micro - 35mm film canisters and smaller containers; extremely small micro-caches are sometimes called nano-caches.
- Small - larger than a micro, but smaller than a regular; examples include sandwich-sized Tupperware and military-surplus decon containers.
- Regular - standard size ammo cans and Tupperware containers.
- Large - 5-gallon buckets and larger containers; examples include large ammo cans, trunks, and jeeps.
A multi-cache involves two or more locations, the final location being a physical container. There are many variations, but most multi-caches have a hint or a set of coordinates to find the second "waypoint", and the second waypoint has hints or coordinates to the third, and so on.
Virtual caches are created in locations where placing a traditional cache would be impossible. There is no container of any sort at a virtual cache site. Instead, a hunter finds the location that the coordinates take them, and then prove they were actually there by taking a picture of themselves and their GPS unit or by answering specific questions about the location. Listing guidelines for virtual caches vary by listing site.
A letterbox is another form of treasure hunting using clues instead of coordinates. In some cases, however, a letterbox has coordinates, and the owner has made it a letterbox and a geocache. To read more about letterboxing, visit the Letterboxing North America web site.
A webcam cache is a location with a public web cam. Finding the cache is locating the webcam and capturing from the cam a photograph of you. Webcams can have a photograph archive system from which to retrieve the photograph. If not, you will need to have someone watching the webcam on a computer to "capture" you at the loation.
An event cache is a set of coordinates along with a date and time to meet there. People can indicate on the website if they plan to attend, and log a "find" if they actually do. Event caches are great ways to meet people, trade hitchhikers, and swap caching stories.
Locationless caches are sometimes referred to as "reverse" caches. In a locationless cache, the "hider" posts a description of a site without supplying coordinates. "Finders" try to find locations that match the description, and they post coordinates to those locations. Not all listing sites accept this kind of cache, but terracaching.com and GPSgames.org welcome locationless caches.
A moving cache is a cache that travels from place to place. Before Groundspeak started selling and tracking Travel Bugs, a number of geocachers released physical caches that finders could pick up and move to a different location. A number of these caches are still active, but new moving caches are no longer allowed to be listed on Geocaching.com. Other sites, such as GPSgames.org, welcome moving caches. GPSgames.org even hosts a specialized geocaching GeoPoker game that features a moving cache.
If a finder decides to move the cache to a new location, they are required to provide updated coordinates and sometimes a new hint. Some contain a logbook and a single item, such as an action figure or stuffed animal, that is supposed to stay in the cache. Depending on their size, they sometimes contain additional trade items.
- Earth cache
- Puzzle (unknown) cache
- More. . .