saudeleur dynasty tomb mausoleum inside walls of nan madol. pohnpei, micronesia, oceania.

adventure ancient archaeological archeology architecture basalt caroline castle chamber city federated fortification heritage historical history holiday island islands jungle landmark madol mausoleum megalith megaliths micronesia moat monument mysterious nan ocean oceania old outdoor pacific passage pohnpei prehistoric rock rocks room ruin ruined scenery secret site slabs states stone tomb tourism town travel tunnel underground unesco vacation walls world