Kailua is a census-designated place (CDP) in Hawaiʻi County, Hawaii, United States, in the North Kona District of the Island of Hawaiʻi. It is the center of commerce and of the tourist industry on West Hawaiʻi. Its post office is designated Kailua-Kona to differentiate it from the larger Kailua located on windward side of Oʻahu island, and it is sometimes referred to as Kona in everyday speech. The city is served by Kona International Airport, located just to the north in the adjacent Kalaoa CDP. Kailua-Kona was the closest major settlement to the epicenter of the 2006 Hawaiʻi Earthquake.

The island of Maui is the second-largest of the Hawaiian Islands at 727.2 square miles (1883.5 km2) and is the 17th largest island in the United States. It is part of the state of Hawaii and is the largest of Maui County's four islands, bigger than Lānaʻi, Kahoʻolawe, and Molokaʻi. In 2010, Maui had a population of 154,834, third-most populous of the Hawaiian islands, behind that of Oʻahu and Hawaiʻi.  Maui is a leading whale-watching center in the Hawaiian Islands due to Humpback whales wintering in the sheltered ʻAuʻau Channel between the islands of Maui county. The whales migrate approximately 3,500 miles (5,600 km) from Alaskan waters each autumn and spend the winter months mating and birthing in the warm waters off Maui, with most leaving by the end of April. The whales are typically sighted in pods: small groups of several adults, or groups of a mother, her calf, and a few suitors. Humpbacks are an endangered species protected by U.S. federal and Hawaiʻi state law.

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.

Hawaii is the newest of the 50 U.S. states (August 21, 1959), and is the only U.S. state made up entirely of islands. It is the northernmost island group in Polynesia, occupying most of an archipelago in the central Pacific Ocean, southwest of the continental United States, southeast of Japan, and northeast of Australia. Hawaii’s natural beauty, warm tropical climate, inviting waters and waves, and active volcanoes make it a popular destination for tourists, surfers, biologists, and volcanologists alike. Due to its mid-Pacific location, Hawaii has many North American and Asian influences along with its own vibrant native culture. Its capital is Honolulu on the island of Oʻahu.