Ah Luxor.
Warm even in December.
Home to Karnak, the Avenue of the Spinxes, and the Valley of the Kings.
Today is Karnak which is massive. Built and unfinished over 200 years.
Columns and obelisks.
They would build columns, fill in with sand, build higher, fill with sand, repeat.
Then paint. Then remove sand and paint, remove and paint, until you have painted all the columns and removed all the sand.
No aliens here as you can tell at the unfinished wall in the picture.