Physical features mapOnline version Click the right feature to move on. by Hadassah Herbert 1 Appalachian Mtns. 2 Rocky Mtns. 3 Piedmont 4 Cape Cod 5 Great Salt Lake 6 Cascade Mnts. 7 Massachusetts Bay 8 Great Plains 9 Sierra Nevada Mtns. 10 Chesapeake Bay 11 Pacific Ocean 12 Atlantic Ocean 13 Gulf of Mexico 14 Cumberland Gap 15 Great Smoky Mtns. 16 Lake Champlain 17 Lake Superior 18 St. Lawrence River 19 Lake Michigan 20 Columbia River 21 Rio Grande 22 Lake Huron 23 Wabash River 24 Lake Ontario 25 Ohio River 26 Arkansas River 27 Lake Erie 28 Mississippi River 29 Hudson River 30 Missouri River 31 Potomac River 32 James RIver