Lynn Loves Letterboxes. I love Lynn. Lynn Is a Lovely Lady. To Those who may not know.....Letterboxing predates Geocaching....to be a letterbox it needs a stamp...please leave the giraffe stamp in the geocache container. To find this letterbox in the way that letterboxing was intended....locate Cottonwood Plaza, find door number 20 around the back then walk past the compost bin, you will see trees, some sticks and stones and hopefully the letterbox geocache container!