Stone money island — Rai stones, manta rays, and living traditions
Yap Island (Colonia is its capital) is one of the most culturally intact islands in Micronesia — home to the famous Rai stones, giant limestone discs up to 4 metres across used as currency (their ownership recorded in oral history since no one can move them), and traditional men's meeting houses called faluw. The surrounding ocean is home to resident manta ray populations cleaned at specific reef stations, considered the world's most reliable manta ray encounter.
Yap's traditional society is one of the most complex in the Pacific — an elaborate caste system, customary land rights, and the stone money economy (rai stones quarried in Palau and transported to Yap since the 9th century) all survived German, Japanese, and American colonial periods largely intact. Yapese traditional dance, navigation, and weaving are still actively practised today. Germany established a colonial station on Yap in 1899; it passed to Japan in 1914 and to US administration after WWII as part of the Trust Territory.