Pacifica, California is famous for its strange rock formations along the Pacific Ocean

The rocks are full of bizarre holes! They're called "Tafoni"

The most surprising part? After decades of study, scientists still aren't sure how they form

Salt erosion, wave action, and tiny microorganisms are all possible explanations

You can visit these strange marvels of nature! Swipe up to learn where to find Pacifica's Tafoni rocks