President Biden's designation protects more than 224,000 acres of volcanic forest habitat, including a dormant volcano and a massive underground aquifer system.

President Joe Biden on Tuesday established two new national monuments in California, the latest in a flurry of major environmental initiatives affecting the Golden State as his presidency comes to a close.

Biden has federally protected 1,053,125 square miles of land and ocean in his term — an area nearly four times the size of Texas.