There are several types of geocaches….
Currently Active Cache Types These ones are similar in that the actual cache is pretty much the same in all cases. It is (in its most basic form) a container in which there is a paper log for you to sign. The variety in types is all about how you actually find the co-ordinates of where the cache is hidden… They can all be of various sizes.
	A Traditional Geocache is one which is at the co-ordinates specified on the cache description page. It is the simplest form of cache, and also the commonest. It may be disguised, it may be difficult to spot but it is where the icon appears on the map.
	A Multi- Cache is NOT at the co-ordinates specified on the cache description page. However you (usually) have to go to where the icon appears on the map. At that point you will find something which directs you to the location of the actual geocache. This might be the actual co-ordinates of the cache hidden in a container, or a puzzle relating to what you might find at the given co-ordinates (for example a village sign, a gravestone, a notice, etc). The cache description will tell you what to look for – and will give you the puzzle to solve. Bear in mind a multi cache may have several stages to visit. Rough rule of thumb – do NOT look for the cache at the given co-ordinates – look for what appears in the cache description.
	A Mystery (or unknown) Cache can be of several types: There may be a puzzle for you to solve to obtain the co-ordinates. This puzzle will (usually) be one you solve at home There may be a challenge for you to meet in order to qualify for the cache. Although challenge-type caches are at the co-ordinates given on the cache description pages if you do not provide evidence that you meet the requirements of the challenge you cannot log the find on-line. Most C.O.s check and delete logs of those who do not qualify. This may be a bonus cache the co-ordinates of which are found from clues in a series of other caches.
	A Wherigo Cache can be found after playing a little (or not so little) GPS-based game using dedicated software. People who have never done Wherigoes are frightened of them. People who have done Wherigoes either love them or hate them. There’s a trick to Wherigoes. Read the words on the screen BEFORE randomly pressing all the buttons…
	A Letterbox Hybrid Cache could effectively be just like any of the above types of cache. However the only difference is that it contains a rubber stamp and ink pad (some people collect imprints of the stamps) READ THE CACHE DESCRIPTION to see whether any given letterbox hybrid cache is at the given co-ords or if there is a puzzle to solve.
Caches without Paper Logs (Currently Active) These are caches for which there is no paper log to be signed. You log your find on-line as described on the cache description page
	An Earthcache requires you to go to a certain location where you answer questions on a geological feature you find at the specified co-ordinates. There may be several locations to visit. Having answered your questions you then email them to the C.O. and then log your find on-line. DO NOT but the answers to the questions into your on-line log.
	Lab Caches are getting increasingly more popular. There’s a separate app for those, and I’ll make another website for them later…
Caches without Paper Logs (Grandfathered) These are also caches for which there is no paper log to be signed. You log your find on-line as described on the cache description page. No new caches of this type are being created; they are rather rare
	A Virtual Cache requires you to go to the co-ordinates specified on the cache description page and perform a task. There may be a question to answer, a puzzle to solve. Specific details appear on the cache description page.
	A Webcam cache requires you to get yourself photographed by a specific webcam. Specific details appear on the cache description page.