Hilo is the second-largest CDP in the State of Hawaiʻi and the largest settlement on the island of Hawaiʻi with a population of 43,263 during the 2010 census. Hilo is the county seat of Hawaiʻi County, Hawaiʻi, and is situated in the South Hilo District. The town overlooks Hilo Bay, and is near two shield volcanoes, Mauna Loa, considered active, and Mauna Kea, a dormant volcano upon which some of the best ground-based astronomical observatories are placed. Hilo is home to the University of Hawaiʻi at Hilo, ʻImiloa Astronomy Center of Hawaiʻi, as well as the Merrie Monarch Festival, a week-long celebration of ancient and modern hula, which takes place annually after Easter. It is also home to the Mauna Loa Macadamia Nut Corporation, one of the world's leading producers of macadamia nuts. It is served by Hilo International Airport, inside the CDP. $$https://vimeo.com/8462409$$

Oahu, known as "The Gathering Place", is the third largest of the Hawaiian Islands and most populous of the islands in the State of Hawaiʻi. The state capital Honolulu is located on the southeast coast. Including small close-in offshore islands such as Ford Island and the islands in Kaneohe Bay and off the eastern coast, it has a total land area of 596.7 square miles, making it the 20th largest island in the United States. In the greatest dimension, this volcanic island is 44 miles long and 30 miles across. The length of the shoreline is 227 miles. The island is the result of two separate shield volcanoes: Waiʻanae and Koʻolau, with a broad "valley" or saddle between them. The highest point is Mt. Ka'ala in the Waiʻanae Range, rising to 4,003 feet above sea level.

San Diego, named after Saint Didacus, is the eighth-largest city in the United States and second-largest city in California after Los Angeles, with a population of 1,306,300 (Jul 2009) within its administrative limits on a land area of 372.1 square miles (963.7 km2). The city is located on the coast of the Pacific Ocean in Southern California. The urban area of San Diego extends beyond the administrative city limits with a population of 2,880,000. San Diego is also the county seat of San Diego County, the 5th largest county, by population, in the United States.