Here are some interesting and mysterious facts about masks:

- Ancient cultures used masks for spiritual and religious purposes, believing they could communicate with the dead and gods.

- Masks were used in ancient Greece and Rome to represent characters in theater, a tradition still seen in modern theater.

- In some African cultures, masks are believed to possess spiritual powers and are used in rituals to ward off evil spirits.

- The oldest known masks date back to 7000 BC, found in the ancient city of Jericho.

- Masks were used in medieval Europe to disguise oneself during the Black Death.