Q: What do you get when you combine copper, lodestone (yes, lodestone), petrified wood, red granite, red and green slate, white quartz?
A: Kryptos.
Kryptos is a sculpture located outside one of the Central Intelligence Agency’s buildings. As the sculpture’s name implies, Kryptos features an encrypted message. Various people working individually and/or as group(s) have attempted to decrypt the message. While progress has been made, work continues to make the decrypted text public. There have also been mistakes; who would’ve thought the decrypted text should say ‘XLAYERTWO’ rather than ‘IDBYROWS’?
While seeing Kryptos isn’t on most tourist’s agendas, another work by the artist is a bit more accessible at the Hishhorn Museum and Sculpture Garden (part of the Smithsonian Institution).