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NASA/Kjell Lindgren · Public domain
Landmark Oceania wonder World Heritage

Great Barrier Reef

3000 BCE – still standing

World's largest coral reef system, visible from space

Wikipedia

The opening of the article, and a way into the rest of it without leaving the site.

Great Barrier Reef on Wikipedia.

Who held this ground

Borders from dated snapshots, up to a century apart; precision varies.

Reconstruction

  1. No border recorded here in this snapshot (3000 BCE–2026 CE)

Elsewhere in Oceania at the time

Records whose own span overlaps this one, found by the same test the canvas draws with. The bar under each card is where it sits inside this one.

See the whole view
Image credits 6 pictures from Wikimedia Commons