Photos of sinking courtyard under office building

Quick answer：

The sinking courtyard under an office building typically refers to a courtyard or open space that has experienced subsidence due to various reasons such as soil settlement, foundation problems, or excessive groundwater extraction. Photos of such an area can be used to document the extent of the damage and assess the structural integrity of the building. It's important to note that sinking courtyards can pose safety risks and may require immediate attention and repair.