There are no tropical diseases and health care is readily available. Saipan has a modern major hospital, and routine health care is available on the other two major islands. U.S. Postal rates apply, and there are post offices on all three main islands as well as private postal companies on Saipan. Post offices are open daily during regular business hours, half day on Saturdays and are closed on Sundays. Inland areas are mostly forested with indigenous and introduced species.
Some islands are fringed with coral reefs which enclose clear shallow lagoons.
Limestone caves and marine grottoes are found on all of the main islands, and many of the Northern islands are still geologically active. The Northern Marianas host a harmonious and eclectic mix of Western and Asian residents. Indigenous Chamorros and Carolinians share the islands with people of Philippine, Korean, Thai, Chinese, Japanese, U.S. Mainland, Micronesia and Indian decent. The ocean temperature averages 82 degrees. The Warm tropical climate dictates loose, comfortable clothing.