North of the ancient agora is the lovely cobblestone Plateia Platanou, where you can pay your respects to the Hippocrates Plane Tree, under which Hippocrates is said to have taught his pupils. Plane trees don't usually live for more than 200 years, though in all fairness this is certainly one of Europe's oldest. This once-magnificent tree is held up with scaffolding, and looks to be in its death throes.
