Here’s a little calling card that says “Herod was here.” If you’ve seen pictures of the Herodion, they look very similar. This is Machaerus, a fortress Herod inherited from the Hasmoneans and fortified to his own satisfaction. (Yes, that’s the Dead Sea in the background).
Josephus says it was at Machaerus that John the Baptist was imprisoned. And beheaded.
Next stop: “the Grand Canyon of Jordan.”