A plain.
The land is flat with a lot of mountains
It has some flat land, but also many mountains and valleys.
There are mountains
valley
valley
north Germany is flat and south is mountains
Canterbury Plains is the largest stretch of flat land in NZ. Canterbury Plains start from Southern Alps base right up to the ocean (including various rivers and plains).
It has mountains.
i think that Texas has more flat land than mountains
No. It has it all: from steep mountains to hilly terrain to flat lands.
the rocky mountains stretch from
Japan does not have flat land; it may have in some places, but in alot of places there are many mountains.