1 Atlantic Ocean 2 Pacific Ocean 3 Hudson Bay 4 Gulf of California 5 Gulf Of Mexico 6 Bering Sea 7 Caribbean Sea 8 Bering Strait 9 Panama Isthmus/Canal 10 Florida Peninsula 11 Yucatan Peninsula 12 Aleutian Archipelagos 13 West Indies Archipelagos 14 Greenland 15 Vancouver Islands 16 Falkland Islands 17 Great Lakes 18 Lake Nicaragua 19 Lake Winnipeg 20 Colorado River 21 Columbia River 22 Mississippi River 23 Missouri River 24 Rio Grande River 25 Amazon River 26 Orinoco River 27 Parana River 28 Amazon Basin 29 Brazilian Highlands 30 Guiana Highlands 31 Atacama Desert 32 Great Plains Grasslands 33 Amazon Rainforest 34 Cascade Range Mts 35 Rocky Mts 36 Sierra Nevada Mts 37 Andes Mts 38 Appalachian Mountains