Ko Olina Lagoon 4, , , , , , , 0, Hawaii Mom Blog: Ko Olina Lagoon 4 (Ulua), www.hawaiimomblog.com, 0 x 0, jpg, Ko Olina encompasses 642 acres featuring a string of four jewel-like lagoons connected by more than a mile and a half of seaside pathways. Daily public parking in designated areas is. Travelers flock to these artificial lagoons along the western coast of Oahu to swim, snorkel, and paddleboard in the calm, crystal clear, turquoise waters and bask in the Hawaiian sun. Book a., 12, ko-olina-lagoon-4, Vacation Destinations Ko Olina encompasses 642 acres featuring a string of four jewel-like lagoons connected by more than a mile and a half of seaside pathways. Daily public parking in designated areas is. Travelers flock to these artificial lagoons along the western coast of Oahu to swim, snorkel, and paddleboard in the calm, crystal clear, turquoise waters and bask in the Hawaiian sun. Book a.