Stalactites are mineral formations that hang from the ceilings of caves. They are created by the deposition of minerals from dripping water, which contains dissolved calcium carbonate. As the water drips, it leaves behind tiny amounts of mineral, gradually building up the stalactite over time. These formations grow slowly, often taking thousands of years to reach significant lengths. Stalactites are commonly found in limestone caves, where the conditions are ideal for their formation. They are often paired with stalagmites, which grow from the ground up, creating stunning cave landscapes.