Do you speak the language of geocaching? When you find a geocache do you triumphantly declare "I came, I saw, I conquered"? We think you do. Geocachers tend to like puzzles, codes, finding hidden things and all kinds of challenges. It's what makes us geocachers! Rot13 was actually developed by Julius Caesar (or maybe someone he knew) in the 1st century BC, and rumor is, he loved geocaching. It is a simple letter substitution that replaces a letter of the alphabet with the letter that is 13 letters after it. Have you ever wondered how the messages are coded on geocache hints? It's Rot13 of course. Works as a Rot13 decoder, a key chain, and is trackable at geocaching.com With all that going for it, we think Caesar would have loved it. This geocoin measures approximately 4,5 cm across.