Observatory (Isu)

The Observatory was a First Civilization complex used to monitor the Earth's population, located in Long Bay, Jamaica.

It could be operated by placing a drop of blood from the person targeted to view into a glass box, and placing the box into the Crystal Skull in the main mechanism. It would then project what the person was seeing and hearing. However, upon entering the main chamber, the alarm system would activate. It would then dispel a light that could vaporize humans, or injure them severely.

Reference

 * Assassin's Creed IV: Black Flag