山顶 (shāndǐng) means "mountain top" or "summit." It is a compound noun formed from 山 (mountain) and 顶 (top), used to describe the highest point of a mountain or hill.
我们终于爬到了山顶,风景太美了。
wǒmen zhōngyú pá dào le shāndǐng, fēngjǐng tài měi le.
We finally climbed to the mountaintop, and the scenery was so beautiful.
站在山顶上可以看到整个城市。
zhàn zài shāndǐng shàng kěyǐ kàn dào zhěnggè chéngshì.
You can see the entire city from the mountaintop.
山顶上的温度比山下低很多。
shāndǐng shàng de wēndù bǐ shān xià dī hěn duō.
The temperature at the mountaintop is much lower than at the base.