Casey and I didn't stop for much in Texas but went letterboxing and had dinner at the Big Texan. We'd hoped to go to Cadillac Ranch, but the patron is newly (and oldly, but I didn't realize) charged with child molesting and it was nighttime (those reasons are separate, not compound) so we skipped it.
I liked the super casual blue jeans and cow parts atmosphere.
Their big thing is the free if eaten in an hour 72oz steak dinner. We were pretty keen to try, but if it's not free it's $72 and since we were just passing through we didn't have a fridge for leftovers. We saw 5 big guys attempt, and none succeeded, but we still kind of wanted to try.