High in the San Gabriel Mountains outside Los Angeles sits one of California’s strangest landmarks — a massive concrete arch that connects to no road and leads to nowhere. Known as the “Bridge to Nowhere,” this isolated span was once the centerpiece of a highway meant to cut through the mountains, linking Azusa to Wrightwood. Built during the Great Depression under the Works Progress Administration, the bridge embodied the optimism of its time. But in 1938, catastrophic floods wiped out the road