“We will, we will rock you” - Queen and cityofrocksnps on #NationalOldRockDay! This Idaho park preserves rocks that are over 28 million years old, which have been eroded into wacky-looking formations! #RockOn #OldAsRock #Idaho #NationalReserve #Geology #RockFormations #WeWillRockYou #RockOn 📸: nationalparkservice