Terranea Beach Cave
A wondrous little portal into another world exists right in Southern California. The trailhead to the Terranea Beach Cave is located at Pelican Cove. From there, a short walk down to the coast will take you to the cave. It's best to go at low tide so that you can easily access the cave. Don't forget your camera so that you can take pictures of the marine life in the tide pools you pass. Also, you'll catch a glimpse of frolicking dolphins in the distance. After your hike, go to the Terranea Resort to grab a bite to eat. The cave and its surroundings are a fun, easy, and cheap mini-adventure.