There are lots of slightly varying accounts of missing islands, lost continents, and lands forgotten to time.
At the same time there are many theories which purport to suggest their existence as well as the explanation for numerous other phenomena such as megalithic sites in alignments and arrangements.
Religions all speak of various levels of chaos in the past, and most speak of most recently the great flood and some discuss how lands were destroyed etc.
Then you have flat Earth with its theories which stretch from completely made up to plausible and reasonable questions to ponder especially when it comes to the space flights, NASA etc.
Pole shifts etc need to be accounted for in the discussion as well for it's relatively common threads and discussion points that tie in.
Some Brought in architecture and tartarian stuff alongside others which also comes in with their own theories.
Most recently I was made aware of VoC and their explanation for the expanded world alongside crater earth which provide additional thoughts.
So putting that all together ....
Where are hidden land, please put any links you have and put forward any theories you like, because we know there are definitely some.
I recently tried to find some of the older content I had seen and was unable to relocate it (mostly related to grid alignments and historical math geomancy)
For those who may be interested to know...it was after WW1 that the internation organisations for time and geographic location began to form.
https://en.wikipedia.org/wiki/International_Astronomical_Union
https://en.wikipedia.org/wiki/International_Time_Bureau
https://en.wikipedia.org/wiki/International_Bureau_of_Weights_and_Measures
https://en.wikipedia.org/wiki/International_Earth_Rotation_and_Reference_Systems_Service
https://en.wikipedia.org/wiki/International_Latitude_Service
https://en.wikipedia.org/wiki/International_Association_of_Geodesy
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They established the GPS standards, the world as we know it, and how we tell time and location. https://nsgreg.nga.mil/doc/view?i=4085