Burney Falls, Shasta County, California, United States

Burney Falls is a waterfall on Burney Creek, in McArthur-Burney Falls Memorial State Park, Shasta County, California.

The water comes from underground springs above and at the falls, which are 129 feet high, and provides an almost constant flow rate of 379 million litres per day, even during the dry summer months.
The falls are an example of river drainage regulated by stratigraphically-controlled springs, and also of a waterfall formed by undercutting of horizontal strata.

The falls were called "the Eighth Wonder of the World" by President Theodore Roosevelt, and were declared a National Natural Landmark in December 1984.
(source)