Three teenage Hawaiian princes traveled to Santa Cruz 130 years ago, shaped surfboards out of redwood trees, and introduced surfing to the mainland.The brothers rode waves at the San Lorenzo River mouth on "o'lo" surfboards. It was the first time anyone had surfed at a U.S. mainland beach. PHOTOS: Hawaiian princes' surfboards return to Santa CruzWhen the princes returned home to Hawaii, they took the surfboards with them. No one knew what happened to the boards until they were recently found buried at the Bernice Pauahi Bishop Museum Museum in Honolulu.Two were carefully transported back to Santa Cruz and will be put on public display at the Santa Cruz Museum of Art and History beginning next week. The boards arrived in town Thursday with a procession of vintage woodies, and received traditional Hawaiian blessings. "The two boards brought here today (belonged to) Koa Kawananakoa and Johan Kuhio Kalaniana'ole, two of the three princes who were here," local historian Geoffrey Dunn said."This is amazing. These boards are so, so special to every surfer in the world. Someone kept that history, how cool is that," said shaper Bob Pearson of Pearson Arrow Surf Shop.The surfboards are 18 feet long and heavy --one is 150 pounds and the other is 175 pounds.Pearson made 14 replica boards he shaped from redwood, and there will be a paddle out surf demonstration with the boards at Cowell Beach in July.The historic Hawaiian princes' surfboards will be on display at the Santa Cruz Museum of Art and History from July 3 through October 25.