What is the mystery about Roanoke island?

The mystery of Roanoke Island involves the disappearance of its English colonists in the late 16th century. The colony, known as the "Lost Colony," was established in 1587 but by 1590, when a relief party arrived, the settlers had vanished with no clear explanation. The Word "Croatoan" was found carved into a post, leading to speculation that the settlers may have relocated to a nearby island.