Just a short, pleasant walk from the famous Sacsayhuamán fortress, you'll discover Q'enco, a fascinating and mysterious Inca sanctuary carved directly out of a massive rock outcrop. Its name means 'labyrinth,' and you'll see why as you explore the zigzagging channels and hidden, subterranean chambers. The centerpiece is a remarkable altar within a cave, a place that feels charged with ancient energy, likely used for sacred ceremonies and sacrifices. It's a more compact and intimate site than its neighbors, offering a unique glimpse into the spiritual world of the Incas.