If you want to adopt a cache, you need to contact the cache owner and have them send it to you at http://www.geocaching.com/adopt. If you can’t get in touch with the owner, just wait until it is archived, then place a new one.
Of course, most of us would prefer that you go out and find some cool spot to highlight with a new geocache. There are lots of nice places out there, so just go out and hide something.
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