Manhattan Beach is one of the best beaches in Southern California. The beach is very wide and the sand is wonderful. In fact if you have been to Waikiki then you have walked on Manhattan Beach sand. When Waikiki was first developed the beach area had little sand and was rather rocky.. so the developers went searching for sand on the mainland. They decided that Manhattan Beach had the best sand and for most of the 1920's the sand from Manhattan beach was shipped to Waikiki.