I'm Sooooooo glad you asked !!
The FAQ link above -thanks - does give some great info.
Here is my boiled-down explanation -
First, a 'Cache' - pronounced "Cash" - is a stash. A cache can come in a variety of sizes. It can be a "nano" - a little tube with a screw on cap barely large enough to hold three aspirin tablets. It can be a pill bottle, plastic jar, tupperware container of any size and/or shape, a metal box or container such an ammo box from a surplus shop. It can be an Altoid box of all the various sizes and shapes those things come in, it can be a hollowed out spot in a tree, board post or pole. It can be anything which will not be spotted and disturbed by non geocahing folks (lovingly referred to as "muggles.") To help, most people paint the cache to match the surroundings. Green, cammo, whatever. Fluorescent colors are not popular, unless you are hiding your cache in the local head shop.
In the cache go a wide variety of things. Smaller caches may have nothing in them but a folded up slip of paper. This is the 'log.' When you find a cache, it is fun to read the log and find out who has been there before you. If the cache is brand new, you get to claim the "FTF" or "First to Find." Some folks put small amounts of money, gift items, CDs or other nice little things which are intended to reward the FTF.
Most caches contain nearly-worthless little items referred to as "Swag." These could be small toys, rubber duckies with the HotSpring Portable Spa logo, coins, collectible items, photos, notes, or just about any little thing. I'm new at it, but I have seen a wide variety of items. I put some spa fragrances and scented candles in mine. Whatever you find, you are supposed to take one, and leave one. It's the honor system, and it works well from what I have seen so far.
Okay, so now you have established what a cache is and what it contains. Now what?
You go onto the website (www.geocaching.com) and choose the part of the world you want to go GeoCaching in. You will then be looking at a long list of caches in your chosen area. Some folks select caches near home, others set up to search a distant area where they will be on vacation. I like to go to a huge off-road recreational area an hour away and combine Jeeping with caching. I call it Jeep-o-caching. But you can download a map with the general location of as many caches as you would like. Then comes the technology - a GPS unit.
I have a very basic unit which can hold up to 500 waypoints. One waypoint can be one cache, or it might take several waypoints to get you to a cache. Either way, I print the map of the overall area, and make notes which will help me find these little beasties. A cable allows me to dump the exact GPS coordinates into the GPS unit. I figure out which one I want to start with, and then you hit the road, or
dirt in my case.
The listing on line for the cache will have hints, clues and other information which will help you find the cache. Keep in mind that they will not be sitting out for muggles to find. So some thinking is going to have to happen - sorry if that rules anyone out...
Once you get to the area, you still have to find the exact location, and some folks make that even harder by purposely giving GPS coordinates which are some distance away. There was one I found on the Ventura Pier - but the coordinates were for the other side of the pier. I had to go back to the web site (hurrah for Iphones) and read the hint to locate that one.
There is much more to it - travel bugs are items with a number which can be tracked all around the world. Some of those which I have found have been from Mexico to Alaska and back. I found one today (in my own cache) which has been to England and would like to go back.
More questions?
