Video from Brien Forester
"IF YOU’VE HEARD ABOUT THE Dendera Light Bulb and want to see the famed relief up close and personal, you will have to visit the underground crypt of Hathor Temple at the Dendera Temple Complex in Qena, Egypt. If you’re looking for a jaw-dropping experience, the beautifully intricate, 2,000-year-old temple is not to be missed.
The Temple of Hathor is one of the most well-preserved temples in all of Egypt. There are three temples to view in the complex: the birthing temple at the front, the temple of Isis behind the main temple, and the main temple dedicated to Hathor. There is also a sacred pool that you can still explore. It’s empty though; sorry, no swimming.
The colors seen throughout the temples are original, and amazingly vibrant considering the inside was once covered in soot from Bedouins and other desert peoples seeking asylum. They would use the temples as shelter, lighting fires for cooking and warmth. Since the temple complex used to be covered halfway in desert sand, it was easy for the soot to accumulate at the top. To show the amount of soot that had to be cleaned, archaeologists chose strips of ceiling in each temple to leave covered in soot as a comparison. The clearing of soot and all the sand burying the temples was tedious work that took years to complete... from the article: Hathor Temple Dandarah, Egypt