Atlantis
Japan.
In Vigo bay. In the remains of shipwrecks long ago.
Some of Antarctica is below sea level, notably the continent beneath the South Pole. The ice is nearly two miles thick and the base of the ice could be below sea level.
Sunken is not a verb so it doesn't have present or past tense. Sunken is an adjective
generally xerophytic plants have sunken stomata
The Sunken World was created in 1948.
The Sunken Billions was created in 2008.
Sunken Treasures was created in 1993.
The Sunken Cemetery was created in 2002.
The opposite of a sunken area would be a raised area or an elevated area.
Dehidration is a major cause in sunken veins.
The Sunken Threshold was created in 2006-02.