It is natural! They were formed by two continental plates converging, coming together.
The High, Rocky range in Colorado is The Rocky Mountains
The Rocky Mountains.
The Rocky Mountains.
rocky mountains
Rocky Mountains
The Rocky Mountains.
The Rocky Mountains
The Rocky Mountains. Five mountain ranges make up the Colorado Rocky Mountains; the Front Range, the Sangre de Cristo Mountains, the Park Range, the Sawatch Range and the San Juan Mountains
rocky mountains
The Rocky Mountains stretch across Montana and Colorado.
The rocky mountains are the largest of all the mountains
The Rocky Mountains pass through Colorado, the name is an homage to the mountain range