Later in the day, we get to Postojna, where lay underground the biggest and oldest natural caves in Europe. There is no word to describe it. After a quick local delicacy stop (Gebaniฤa), we enter the caves for one hour and a half. The stalagmites and stalactites are huge, as they are million years old. And the shapes vary from little elves to massive organs, or even Ancient Greece temple columns ! Breathtaking, and highly recommended!!