Highway 1 traverses 70 miles of mountains and cliffs above the blue Pacific, creating one of the world’s most dramatic road trips. But the vertiginous route, since opening in 1937, has suffered dozens of closures from hundreds of landslides, which often activate during winter rains. Reporters: Jim Carlton and Jennifer Kerrigan Photographer: Max Knight Producer: @jacob.ohara #bigsur #highway1 #california #travel #wsj