(obsolete) Rocky Mountains (a mountain range in the United States)

many a mickle makes a muckle, small things together become a large thing; literally dust, if piled up, becomes a mountain

(Japanese mythology) the fabled mountain at the 高天原 (takama no hara, “heavens”)

a bird in the hand is worth two in the bush

perseverance and hard work can overcome any obstacle; where there's a will, there's a way

many mountains and rivers

neither fish nor fowl, up in the air