Mexico
Great Lakes
Rio Grande
Cascade Range
Neartic
Isthmus of Panama
Guatemala
Lake Erie
narrow curve of land that connects North and South Americaan endemic species inhabiting Sierra GordaCentral American country that runs parallel to the Cocos ocean plateYou'll find nearly 20% of the world's fresh surface water here.stretches of it act as a natural border between the U.S. and Mexico.North America and Canada make up this ecoregion.location of Mount St. Helensone of only 17 countries recognized as mega-diversethis body of water is a natural border between the U.S. and Canada.an endangered species found in Sierra Gorda
- Mexican Plateau
- Sonoran Desert
- Great Lakes Basin
- Rio Grande Valley
- Salamander species
- Guatemala City
- Lake Ontario
- Panama Canal
- Sierra Gorda Pine-Oak Forests
- Lake Huron