Beautiful churches and particular monasteries are present everywhere in the world, but this is one of the most original places of worship that is housed on a hill, and in particular inside a cave. The rock church of St. Simon in Mokattam, a hill east of Cairo, Egypt, is a beautiful work of architecture within a natural site and offers a place for the people of Zabbaleen to perform their religious practices. The church was founded in 1975, and since then the space has proved to be particularly suitable for hosting prayers and worship ceremonies