The Ouroboros

The Ouroboros is a labyrinth, located under Kaocho. It was built by the ancient Exathi of current day Ayuthay to hide the Sol Mask. It is said to ensnare anyone who enters.

Origin
The name ouroboros is Greek ("ουροβóρος") and means tail-eater. In real world mythology it is often depicted as a snake or dragon biting its own tail. It symbolizes the eternal cycle of nature.