Number + 个 + 弯
The noun 弯 (wān) means "a turn," "a bend," or "a curve" and refers to a point where a road or path changes direction. It is often used with measure words and verbs of movement, as in 拐一个弯 (make a turn).
前面有个急弯,你慢点开。
qián miàn yǒu gè jí wān, nǐ màn diǎn kāi.
There's a sharp turn ahead; slow down.
这条山路有很多弯,骑车要特别注意。
zhè tiáo shān lù yǒu hěn duō wān, qí chē yào tè bié zhù yì.
This mountain road has many curves; you need to be extra careful when cycling.
过了这个弯就能看到大海了。
guò le zhè gè wān jiù néng kàn dào dà hǎi le.
Once you pass this bend, you'll be able to see the ocean.