Koutouki Cave is located on the eastern slope of Mount Ymittos, outside the town of Peania. It was discovered by accident several years ago, when a goat fell into the cave through a hole in its roof. The shepherd climbed in to rescue the animal and discovered one of Europe's most beautiful caves. Nowadays, visitors can enter the cave through a tunnel to admire the impressive stalagmites and stalactites. A guided tour of the cave starts every 30 minutes. It can be reached from the city center by car in an hour.