Ua Pu

Ua Pou (also known as Ua Pu) is the third largest of the Marquesas Islands, located about 50 km (30 mi.) south of Nuku Hiva, in the northern Marquesas. Until recently, it was the most populous of the islands, because when the other islands were being ravaged by diseases introduced by European explorers and traders, the Catholic priests on Ua Pou finally took to quarantining the remnant of the native population inside their churches whenever visiting ships approached the island, thereby reducing their exposure to external diseases.
See more at Wikipedia.org...