Mountain pass - online puzzles

A mountain pass is a navigable route through a mountain range or over a ridge. Since many of the world 's mountain ranges have presented formidable barriers to travel, passes have played a key role in trade, war, and migration. At lower elevations it may be called a hill pass. The highest vehicle -accessible pass in the world appears to be Mana Pass, located in the Himalayas on the border between India and Tibet, China.