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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.

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 credits6 pictures from Wikimedia Commons