Since this event pre-dated human history, there is no record of it.
That said, the first iceberg calved off the Antarctic ice sheet in much the same way as icebergs calve off today.
No, Antarctica is a continent.
The worlds largest iceberg would be: Iceberg B-15. It is located at Antarctica.
Iceberg D-16 is a city sized iceberg discovered on the 27th March 2006.
Antarctica
Antarctica
B-15 - The largest iceberg recorded, measuring around 11,000 square kilometers. A-68 - Another massive iceberg that split from the Larsen C Ice Shelf in 2017. C-19 - A large iceberg that broke off the Ross Ice Shelf in Antarctica. A-74 - A massive iceberg that calved from the Brunt Ice Shelf in 2021. C-16 - An iceberg that broke off the Pine Island Glacier Ice Shelf in Antarctica. D-16 - A large iceberg that calved from the Amery Ice Shelf in Antarctica. B-22 - An iceberg that broke off the Larsen Ice Shelf in Antarctica. A-45 - A large iceberg that calved from the Amery Ice Shelf. C-18 - An iceberg that broke off the Ross Ice Shelf in Antarctica. A-22 - An iceberg that split from the Larsen Ice Shelf.
Iceberg climbing is not allowed in Antarctica: it is too extreme a sport to be allowed. You'll wear several jumpers and a down coat over them in order to stay warm in Antarctica.
A very large iceberg, breaking off from the glacier, caused problems when it drifted into a busy shipping lane.
The largest iceberg ever recorded was called Iceberg B-15. It measured approximately 183 miles long and 23 miles wide, with an area of about 4,200 square miles. It broke off from the Ross Ice Shelf in Antarctica in the year 2000.
The Hilpanay Mountains, Plapanop Iceberg and Ginger Valley
On November 24, 2007 the MS Explorer hit an iceberg off of Antarctica. The crew and passengers were rescued safely by another ship. I'm sure that there were others that had hit and sunk due to icebergs but may have not been recorded or known about.
The biggest iceberg ever recorded was Iceberg B-15, which calved from the Ross Ice Shelf in Antarctica in 2000. It was initially about 4,250 square miles in size, roughly the size of the state of Connecticut.