Sinkholes could be caused by any number of reasons as reported in Guatemala: underground water construction, construction of buildings where the bottom of the land surface is of lime stones, carbonate rock or salt beds. or the construction of sewers and waterlines.
The Philippines has plenty of deep wells for areas not reached by the national waterworks. Even in the cities, some have installed deep wells, to prepare for any cut of the water service in case of repairs to be done on the water pipes or the shortage of water because of drought.
In some business areas , skyscrapers can be seen.The taller the building is, the deeper the foundation should be.
