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Inside the Cave

Formation of the cavern began about 25 million years ago. It now soars to the height of a 12- story building and stretches the length of a football field. Care is taken not to disturb the natural habitat of the wild animals that dwell here. Sea lions gather in this natural amphitheater, usually during fall and winter. In spring and summer, they breed and have their young on rock ledges just outside the cave.

Outside view of the complex
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Visitor's view into the Cave
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  • Largest sea cave in the world
  • Discovered in 1880 by William Cox
  • Height: equivalent to 12 story building
  • Length of a football field
  • Elevator access to cave since 1961

  • Formed 25 million years ago

  • Cave is made of Basalt Rock

Hear about the Cave