p442m2461429 - DS - One of the three massive walls constructed of huge volcanic basalt columns. Nan Madol is the only extant ancient city built on top of a coral reef. In 1985, the ruins were declared a historical landmark and a greater effort is being made to preserve them;
| Réf. | p442m2461429 |
|---|---|
| Titre | One of the three massive walls constructed of huge volcanic basalt columns. Nan Madol is the only extant ancient city built on top of a coral reef. In 1985, the ruins were declared a historical landmark and a greater effort is being made to preserve them; |
| Crédit | plainpicture/Design Pics/Dave Fleetham |
| Licence | Droit simplifié (DS) |
| Autorisation |
Autorisation du modèle : Non Autorisation du propriétaire/lieu : Non |
| Version maximum |
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