a plateau
Lava plain
Cuba
vast plain on rolling hills are a vast plain full of hill, that form volcanos, lanslides, mudslides, and lava flows.
Plateau
a plateau
caracas
I don't think it's exactly a plain you're looking for. Magma erupting out of a fissure and spreading over a large area leads to the formation of thick solidified sheets of lava. After later eruptions, more sheets pile up to form extensive, flat topped lava plateaus.
Europe
Spanish food
Hugo Shavez
Petróleo