Grand Coulee
Grand Coulee is an ancient river bed in the U.S. state of Washington. This National Natural Landmark stretches for about 60 miles (100 km) southwest from Grand Coulee Dam to Soap Lake, being bisected by Dry Falls into the Upper and Lower Grand Coulee.
| Grand Coulee | |
|---|---|
Grand Coulee, below Dry Falls. The layering effect of periodic basalt lava flows is visible. | |
Map of Washington state | |
| Location | Washington state |
| Coordinates | 47.62°N 119.3075°W |
U.S. National Natural Landmark | |
| Designated | 1965 |
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