Six apartment blocks have just been demolished, to allow the construction of two brand new 40-storey skyscrapers. As construction workers prepare the site, they notice a strange phenomenon in the ground - a perfectly preserved circle of large holes, almost 13 metres across.
What they had stumbled upon would generate huge excitement and controversy: either they had unearthed a rare and mysterious 2,000 year old Indian site - or a 1950s septic tank or an ancient inverted American Stonehenge or a unique Mayan village in North America.
For a while theories ranged far and wide. But finally, after examining the strategically-placed holes, and the range of artefacts found around the circle - stone tools, shark bones, axe heads - archaeologists began to believe that this was a genuinely unique site - the remains of a mysterious forgotten tribe called the Tequesta.
Read more interesting topic about archaeology excavations.