The Plain of Wallachia is located in the country of Romania.
Romania has approx. 35 % from the area as plains.
Romania.
Oh, dude, like, the large plain found in Romania is the Romanian Plain. It's, like, one of the most extensive plains in the country, stretching across, like, a big chunk of southern Romania. So, yeah, if you're ever in Romania and want to see some flat land, that's the place to go.
Romania
Bucharest is the capital and largest city of Romania.
The largest plain in Europe is known as either the European Plain or the Great European Plain.
The biggest city in Romania is Bucharest.
Romania has an area of 238 391 km2 and is 82nd in the world.
That should be Wallachia, I believe, and it would be Romania.
West Siberian Plain
Romania