We follow a long set of wooden stairs deep underground to a sea cave with a mysterious and colorful past, and take in a spectacular, hidden view of the Pacific Ocean in La Jolla.

Beach Week: The Gray Man (Classic)

An audio guide to the world’s strange, incredible, and wondrous places. Co-founder Dylan Thuras and a neighborhood of Atlas Obscura reporters explore a new wonder every day, Monday through Thursday. In under 15 minutes, they’ll take you to an incredible place, and along the way, you’ll meet some fascinating people and hear their stories. Our theme and end credit music is composed by Sam Tyndall.