Legacy Caching - Message in a Nalgene Bottle

The idea came to me when I was sitting in Notre Dame Cathedral in Paris. It was one of those moments you experience when traveling: the feeling of mystery, intrigue and wonder. I was in awe; architectural feats of high arched ceilings, intricate artwork details and masonry surrounded me.

It was hot and sticky outside, yet the inside of the cathedral felt cool, dusty and grey, like a scene from an old spy movie. With all of the nooks, passages and obscure locations, I couldn't help but wonder h...