Umpherston Sinkhole or Balumbu
Umpherston Sinkhole or Balumbul History Umpherston Sinkhole or Balumbul is a natural Sinkhole today operating as a “Beautiful Garden” once typically a limestone cave. But over a period of time this limestone cave formed through the dissolution of soluble rocks. Initially Sinkholes formed through small erosion of limestones by sea water waves and ground water … Read more