Bamboo grows in almost all areas, but high-quality timber grows mostly in the highland valleys.

The Chakmas generally lived in the highland valleys.

The Marmas also live in the highland valleys.

The first Mexicans hunted big animal herds in the grasslands of the highland valleys.

Local farmers started growing coffee in the highland valley in the 1890s.

Much of the highland valley has good farmland, the reservation hosts several ranches, a chapel, tribal offices, community center, and ball park, created by the tribe.

Ms. Bourin, who was helped by her late husband, has spent the last two decades building a house in an isolated highland valley facing the sea.

The film's long second half follows the two parties through dusty highland valleys and treacherous mountain passes.

Today's Maya locate their clays in the exposed river systems of the highland valleys.

The clays are located in exposed river systems of the highland valleys.