Ok...here it is:
Here is what I know:
"not too big of a deal."
"Southwest Airlines out of Love Field"
my verbal guess: The Grand Canyon
"not the Grand Canyon"
"it is the 2nd biggest canyon in the US"
Sooooo.....I google and find:
Palo Duro Canyon in Admirillo, TX
...and I think there might have been a hint of "a secret trail" which brought me to the Triassic Trail.
So Thursday night, I am writing this and having it post automatically on Saturday about noon...because, I'm guessing by noon, I have seen the following view:
Then again, I could be wrong....