Crossword puzzle clue "without imagination"

Without imagination

Answer to the riddle "What has rivers without water, forests without trees, and cities without houses?"

It challenges the imagination

Boxer who said "The man who has no imagination has no wings"

"To invent, you need a good imagination and ___ of junk" --Thomas Edison

Stagger the imagination

N.Y.C. subway line in one's imagination?

Leaving less to the imagination