Philibert Aspairt's Chartreuse-Glass Goggles

Origin
In November of 1793, Philibert Aspairt went into the Paris Catacombs in search of the entrance to the cellar of the Carthusian Convent located underneath the Jardin du Luxembourg, likely after some bottles of their famous Chartreuse liqueur. After that going down, it would be 11 years before he was seen again. His body was found in 1804 in one of the quarry galleries, skeletal and only identified by the key-ring of the Val-de-Grace on his belt. He was buried in the same spot he was found.

What is unknown to the public at large is that he was found with two empty Chartreuse bottles at the scene. They were quickly removed and returned to Warehouse 11 by a quick acting agent. Some time later, during the building of Warehouse 13, M.C. Escher had the imspired idea to repurpose the bottles. Carefully grinding them into lenses, he was able to fashion two pairs of googles used for traversing the Escher Vault.

Effects
When the glass is looked through, the path towards one destination becomes clear. It will accurately show the correct turns and movements one must take, even showing paths that do not exist at the time. For this reason, they are used for navagating the twisting and ever-changing Escher Vault.

If the goggles are removed while one is still lost, however, they will experience a massive drain of energy followed by a drunk sensation.