You climb toward the Mokattam cliffs and the city opens into a vast amphitheatre cut straight into the rock, with stone reliefs carved across the cliff face. This is the Cave Church, the largest Christian church in the Middle East, with seating for around 20,000 people. Your guide explains how it was built from the 1970s onward by and for the Zabbaleen community, and the story of St. Simon the Tanner behind its name. The acoustics alone are worth the stop.

Below the church spreads Manshiyat Naser, where the Zabbaleen have collected and sorted Cairo's waste for generations. Up close it is organized rather than chaotic: workshops sorting plastic, paper, and metal, with recycling rates that outperform many Western cities. Your guide walks you through how the system works and how families live and earn here, treating the community as people rather than a spectacle. It is a candid, humanizing look at a part of Cairo few tours include.