There are many east-west mountains, some of which are as follows:
1. Alps: located in the middle of Europe, stretching from the southeast of France to the border between Austria and Slovenia. It is one of the highest mountains in Europe and one of the most famous mountains in the world.
2. Andes: located in the west of South America, stretching from Colombia to the south of Chile and Argentina. It is the longest mountain range in the world and the highest mountain range in South America.
3. North American Rocky Mountains: located in the west of North America, stretching from British Columbia, Canada, to New Mexico, the United States. It is the longest mountain range in North America and one of the most famous mountains in the United States.
4. Qinghai Tibet Plateau: Located in western China, it is the highest plateau in the world and the largest plateau in Asia. It includes Himalayas, Kunlun Mountains and Tianshan Mountains.
5. Altai Mountains: Located at the junction of Russia, Mongolia and China, it is a mountain range in Asia. It is one of the oldest mountains in the world and one of the largest mountains in the world.