Karnak is not one temple but a whole religious city, built and expanded by more than 30 pharaohs over roughly 2,000 years. The centerpiece is the Great Hypostyle Hall: 134 massive sandstone columns packed so densely that sunlight falls through them in narrow, shifting bands.
Beyond the Hypostyle Hall, the site holds the Avenue of Sphinxes, obelisks raised by Hatshepsut, and the sacred lake once used for priestly purification.
Thirty pharaohs added to Karnak over two thousand years.