https://apnews.com/30d7c63823a8b9976d3d95671c78eb50 > LOS ANGELES (AP) — Days after the discovery and swift disappearance of two shining metal monoliths half a world apart, another towering structure has popped up and then quickly vanished, this time from the pinnacle of a trail in California. > After photos were posted on social media, the tall, silver metallic structure drew hikers to the top of the Pine Mountain trail in an Atascadero park, halfway between San Francisco and Los Angeles, KEYT-TV reported Wednesday.