The Wallis Annenberg Wildlife Crossing—the largest of its kind in the world—is currently under construction nearby. I climbed the hill out back and saw it in the distance, spanning the 10-lane 101 freeway. Decades in the planning and fundraising, this vital structure will protect biodiversity across the region by linking undeveloped land that‘s currently fractured by major roads. It’s hoped that it will help prevent the extinction of our threatened mountain lion population. The crossing is due to be completed some time next year.