These megalithic marvels are known as Dragon Houses and there are 23 of them on the island, mostly in the regions of Mount Oche and Styra in Euboea.

These mortar-fee constructions are thought to date back to the Preclassical period of Ancient Greece, the classical period beginning around 490 BC. They have stood, pretty much intact, for more than two millennia but their origins and purpose are a true ancient megalithic mystery. Watch the video for more!