Question: what are natural structures hanging from a cave ceiling
Answer: A stalactite ( UK : / ˈstæləktaɪt / , US : / stəˈlæktaɪt / ; from the Greek stalasso , ( σταλάσσω ) , `` to drip '' , and meaning `` that which drips '' ) is a type of formation that hangs from the ceiling of caves , hot springs , or manmade structures such as bridges and mines .