When White made landfall, he found fresh tracks in the sand, and the word "CROATOAN" carved into a post. The houses had been dismantled and all items had been removed. Although White attempted to locate the colonists, they were never heard from again.
Kryptos
This mysterious encrypted sculpture was designed by Jim Sanborn. It currently resides outside of the CIA headquarters in Langley, Virginia. In fact, the statue is so complicated and puzzling that not even the CIA itself has been able to crack the code.