Ubar, often referred to as the "Atlantis of the Sands," is a legendary lost city mentioned in ancient texts, particularly in Arabian folklore. It is said to have been a prosperous trading hub located in the Arabian Peninsula, known for its wealth and advanced civilization. The search for Ubar has captivated explorers and historians for centuries, with various theories suggesting its possible location in the Rub' al Khali, or Empty Quarter, a vast desert in Saudi Arabia. Despite numerous expeditions, the city remains elusive, fueling speculation and intrigue about its existence and fate.