
The Rocky Mountains were once a great obstacle to those traveling west. Today, they are passable but still formidable in their height and the length of the mountain range. In these ways, among others, the Rocky Mountains are truly a natural wonder! Readers find out the combination...

The Rocky Mountains were once a great obstacle to those traveling west. Today, they are passable but still formidable in their height and the length of the mountain range. In these ways, among others, the Rocky Mountains are truly a natural wonder! Readers find out the combination...