The Vourina Spring is situated roughly half an hour away from Kos Town. To enter it you have to go down a long corridor of around thirty meters at the end of which you will get to a cone-shaped chamber, 10 m. in perimeter and 7 m. in height, with a vaulted roof probably dating back to Hellenistic times. A square opening at the top provides adequate air and light. The water from the Vourina spring is channeled towards Kos Town providing most of the town’s water. A small chamber can be found at the beginning of the corridor that was probably used by guardians of the spring.
According to ancient tradition, the water of the Vourina spring gushed out after the mythical king of Kos, Halkon, hit the rock with his foot. The 3rd century BC bucolic poet Theocritos described the landscape surrounding the spring, saying that cool and leafy trees rustled there, poplars and elms, which formed a deep-shaded forest with their foliage like arched hair (Idyll VII).