An ancient man-made near ground surface rock cavern group was found in Longyou County, Zhejiang Province. The 24 large caverns were excavated 2000 years ago.

浙江省西部龙游县的龙游大型古地下洞室群由24个洞室组成，该洞室群开挖于2000年前。

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A structure usually refers to any large, man-made object permanently fixed to Earth's surface or in its orbit, as a result of construction.

结构通常指固定于地球表面或绕地球轨道运行的大型人造建筑物体。

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For natural, man-made stone craft and refurbishment of the crystal surface, suitable for mining, hotels, Buildings, supermarkets, hospitals, schools and so on.

用于天然，人造石材的晶面工艺与翻新，适用于工矿，宾馆，大厦，超市，医院，学校等。

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Many of them question whether cultural phenomena, including destruction layers, cultural-piercing features (man-made structures displaced by surface rupturing, e.g. viaducts), structural damage to buildings, indications of repairs, historical accounts and myths can be reliably used as earthquake indicators.

UNESCO: Tales set in Stone: learning from ancient earthquakes

Topography: configuration of a surface including its relief and the position of its natural and man-made features.

UNESCO: L O S S A R Y

The researchers specifically rejected any assumption that the 1995 increase of hurricane activity was related to any global surface temperature increases over the past century that might be ascribed to anthropogenic (man-made) greenhouse gases.

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