Step back in time and delve deep into the earth at Derinkuyu, an incredible multi-level city carved entirely underground. You'll navigate a maze of narrow tunnels and ancient staircases, discovering rooms that once served as homes, stables, churches, and schools for up to 20,000 people. The air is cool and the passages can be low, so be prepared to duck your head as you explore this amazing feat of ancient engineering. It's a truly unique experience that gives you a real sense of how people lived centuries ago.