Ceiling of the Temple of Esna, Egypt (© Nick Brundle Photography/Getty Images)

At the Temple of Esna, south of Luxor, Egypt, visitors enter a vivid world devoted to Khnum, the ram-headed god believed to have moulded humanity from Nile clay. Built mainly during the Ptolemaic and Roman eras, the temple's surviving hall is supported by 24 towering columns, each carved with intricate reliefs and ritual texts honouring various deities.