http://bazaarboom567hsuxjspmwurpl7lyx23p7r2byg22vwfhv5yubvvezid.onion/faq/for-vendors/dead-drops-guide
A stick, stone, piece of cement, or even pet waste can be used to disguise a dead drop as anything if you have the time and desire. It can be placed in a flowerbed, on a lawn in low grass, by a path in the park, in a clearing, by a shore, but no one will even notice or think that something valuable is hidden inside. Someday, we will release a video tutorial on stealth drops creation.