Neogene Oceania

Kauai, sometimes written Kauai, is one of the main Hawaiian Islands. It has an area of 562.3 square miles (1,456.4 km2), making it the fourth-largest of the islands and the 21st-largest island in the United States. Kauai is 73 miles (117 km) northwest of Oahu, across the Kauai Channel. The island's 2020 population was 73,298.

Niʻihau, sometimes written Niihau, is the seventh largest island in Hawaii and the westernmost of the main islands. It is southwest of Kauai across the Kaulakahi Channel. Its area is . Several intermittent playa lakes provide wetland habitats for the Hawaiian coot, the Hawaiian stilt, and the Hawaiian duck. The island is designated as critical habitat for Brighamia insignis, an endemic and endangered species of Hawaiian lobelioid. The United States Census Bureau defines Niihau and the neighboring island and State Seabird Sanctuary of Lehua as Census Tract 410 of Kauai County, Hawaii. Its 2010

small islands and atolls in the Hawaiian archipelago

thumb|upright=1.3|Kaula Island viewed from the north on Kaʻula Island, also called Kaʻula Rock, is a small, crescent-shaped island in the Hawaiian Islands. It is located 22 miles southwest of Niʻihau.

non-regular jagged mountain range in Oahu, Honolulu County, Hawaii