Qasr al-Farid (The Lonely Castle), an incomplete solitary tomb made by the Nabataeans located at Madain Salih, Saudi Arabia. It is unknown who this tomb was being made for before it was abandoned.

Qasr al-Farid (The Lonely Castle), an incomplete solitary tomb made by the Nabataeans located at Madain Salih, Saudi Arabia. It is unknown who this tomb was being made for before it was abandoned. 1