a hole or chamber formed underground naturally by rocks gradually breaking down over time
洞穴
an area of rock that is high above the ground with a very steep side, often at the edge of the sea
悬崖
a naturally raised area of land that is higher than the land around it, often with a round shape
山
a very tall and large natural structure that looks like a huge hill with a pointed top that is often covered in snow
山
a natural and continuous stream of water flowing on the land to the sea, a lake, or another river
河
a solid material forming part of the earth's surface, often made of one or more minerals
岩石
the area of land where the land meets a body of water such as an ocean, sea, lake, or river
岸
a mountain with an opening on its top, from which melted rock and ash can be pushed out into the air
火山
having a surface that is covered with large, uneven, or rough rocks, stones, or boulders
岩石
(of a surface) having a sharp slope or angle, making it difficult to climb or walk up
陡
(of a person) having a height that is greater than what is thought to be the average height
高的