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One of California's best-kept secrets now requires advance booking , as surging crowds are forcing officials to cap access to the iconic Burney Falls.

The waterfalls are located in McArthur-Burney Falls Memorial State Park in Shasta County, California, about 60 miles northeast of Redding.

Burney Falls is known for its year-round flow — even in drought conditions — and for water that appears to beautifully pour directly from its volcanic rock cliffs .

ISLAND CRACKS DOWN AS TOURISTS ARE SLAPPED WITH NEW FEES, FED-UP LOCALS REVOLT

The waterfalls were once called the "Eighth Wonder of the World" by Theodore Roosevelt, according to SFGate.

But that beauty has come at a price, and officials are launching a pilot program beginning May 15 to limit access and ease overcrowding .

The California State Parks system is capping daily vehicle access at Burney Falls as part of a pilot program to reduce overcrowding.…