Answer: canyons

AnswerCrossword Clue
CANYONSGorges
CANYONSZion National Park sights
CANYONSThings carved into the crust
CANYONSPlateau separators
CANYONSEcho spots
CANYONSWhere echoes echo
CANYONSSpaces between peaks
CANYONSColorado River scenes.
CANYONSBryce and Grand.
CANYONSBryce, Kings, Walnut, etc.
CANYONSBadlands features
CANYONSWestern backdrops
CANYONSEcho locations
canyonsa large heavy gun usually mounted on a carriage
canyonsheavy-caliber automatic aircraft gun firing explosive shells
canyonsCANYON, a deep gorge or ravine