It's about 50% percent below the sea level!
27%
Netherlands
The Netherlands. Or Holland as many people call it. Holland is really a province in The Netherlands.
Most parts of the Netherlands are below sea level / below the water level of the rivers that flow through the country. If there were no dams and dykes, those lands would be flooded.
The Netherlands
The answer is the Netherlands (Holland).
That would be the Netherlands.
About 25%
1 meter below, behind the dunes and after that just like 10 cm above.
The Netherlands
All of the Netherlands lies below sea-level
The Netherlands.
About a third of the country is below sea level. This is indeed a very unique physical feature.