The term 'Sites for Stalactites' refers to the natural geological formations known as caves or CAVERNS. CAVERNS are large underground spaces that are formed by the dissolution of soluble rocks such as limestone, dolomite, and gypsum. Stalactites are a type of speleothem, which are mineral deposits that form in caves due to the dripping of water from the ceiling. Stalactites are typically found in limestone caves, and they can take thousands of years to form.