Describing a clean place
这个地方 + 很/真 + 干净Use 很 (very) or 真 (really) before the adjective 干净 (clean) to emphasize or describe a place. This structure is often used with location words such as 山 (mountain) and others.
这座山很干净。
This mountain is very clean.
这个公园真干净!
This park is really clean!