a low area of land between mountains or hills, often with a river flowing through it
山谷
a very tall and large natural structure that looks like a huge hill with a pointed top that is often covered in snow
山, 高山
a naturally raised area of land that is higher than the land around it, often with a round shape
山丘, 小山
the salt water that covers most of the earth’s surface and surrounds its continents and islands
海
the area of land where the land meets a body of water such as an ocean, sea, lake, or river
海岸, 岸边
a natural and continuous stream of water flowing on the land to the sea, a lake, or another river
河流, 小溪
a hole or chamber formed underground naturally by rocks gradually breaking down over time
洞穴, 穴
a device with a needle that always points to the north, used to find direction
罗盘, 指南针
a mountain with an opening on its top, from which melted rock and ash can be pushed out into the air
火山