Subscribe and 🔔 to OFFICIAL BBC YouTube 👉 https://bit.ly/2IXqEIn Stream original BBC programmes FIRST on BBC iPlayer 👉 https://bbc.in/2J18jYJ Travel to the heart of the Great Pyramid of Giza - the only surviving Wonder of the Ancient World. Built over four and a half thousand years ago, the pyramid is the tomb of the Pharaoh Khufu. You can pass through the solid stone blocks that make up the Pyramid’s core to explore its hidden passages and chambers. The Great Pyramid’s architects and builders worked with great precision: the access corridors and chambers align almost perfectly on a north-south axis. Watch Ancient Invisible Cities on the BBC: https://bbc.in/2oFxiHi Ancient Invisible Cities | Series 1 Episode 1 | BBC #bbc All our TV channels and S4C are available to watch live through BBC iPlayer, although some programmes may not be available to stream online due to rights. If you would like to read more on what types of programmes are available to watch live, check the 'Are all programmes that are broadcast available on BBC iPlayer?' FAQ 👉 https://bbc.in/2m8ks6v.