Silver Cord Cascade
Silver Cord Cascade is a horsetail type waterfall on Surface Creek, a tributary of the Yellowstone River in Yellowstone National Park. Surface Creek flows out of Ribbon Lake off the South rim of the Grand Canyon of the Yellowstone and plunges to the Yellowstone River. It is considered the tallest waterfall in Yellowstone.
Hemmed-In-Hollow Falls
Hemmed-In-Hollow Falls is a single-drop waterfall located within the Ponca Wilderness Area of the Buffalo National River in northern Arkansas. The height of the falls is 209 feet (64 meters). According to the National Park Service, it is the "Tallest waterfall between the Rockies and the Appalachians."