Karst landscapes are characterised by solution and voids in the bedrock and this can result in geohazards. An uneven bedrock surface, gradual ground subsidence or sudden collapse associated with subsurface voids can results in significant problems for engineering.
Collapse of buildings into a doline, North Yorkshire, 1997. Photo source: British Geological Survey
More information on sinkholes (enclosed depressions) can be found here (redirect to Groundwater programme).
More information geohazards associated to karst landscape can be found here (redirect to Groundwater programme).