Nan Matol
Nan Matol is the ruins of the largest-ever "city" on the sea in the Federated States of Micronesia. External links http://www.mofa.go.jp/region/asia-paci/spf/palm2000/palm-summit/qanda/answer.html#a12 More information is at http://www.dropbears.com/b/broughsbooks/history/pohnpei.htm