A California cougar (Puma Concolor) watches the golden sunset above Los Angeles and Santa Monica Bay. Living on the urban fringe of a bustling metropolis, this mountain lion survives high in the hills above celebrity mansions overlooking the Pacific Ocean. The only other megacity with urban lions is Mumbai, India. Mountain lions in the Santa Monica Mountains are endangered and suffer from genetic inbreeding because they are surrounded by the bustling 405 and 101 Freeways in Los Angeles. Fortunately, the world’s largest wildlife crossing, The Wallis Annenberg Wildlife Crossing, is now being built and may ensure the mountain lion’s survival.