Check out this video. ClownsInAmerica Kryptos code on monument in Langley.
https://youtu.be/CjpGZN742Lc
15:00 min mark.
"Slowly desperately slowly the remains of the debris that encumbered the lower part of the doorway was removed. With trembling hands I made a tiny breach in the upper lefthand corner and then widening the hole a little I inserted the candle and peered in. The hot air escaping from the chamber caused the flame to flicker, but presently, details of the room emerged from the mist. X can you see anything Q."
^Coded on monument in Langley
Note: The above is a paraphrase from "The Tomb of Tut-Akhn-Amen" written by Mr. Howard Carter