In 1929, a landslide caused an entire San Pedro neighborhood to break off the cliffside and tumble into the ocean. Street artists have since emblazoned the remains of the disaster with astonishing colors and designs."Sunken City" is what locals call this diamond in the rough. After a short hike downhill, you'll find yourself dipped into an almost alien world. You can explore the mysterious graffiti that surrounds you, then lounge on a concrete slab jutting from the earth and daydream while the sunset washes over the ocean.