Gyz Gala and Oglan Gala are the remnants of ancient fortresses located in Merv, near the city of Mary in Turkmenistan. These ruins are part of the larger archaeological site of the Ancient Merv, which is recognized as a UNESCO World Heritage Site. Gyz Gala, also known as the 'Maiden’s Castle,' is a particularly impressive structure featuring double-walled defenses and is believed to have been a palace or a temple. Its name possibly reflects a local legend about a king's daughter who defended the city against enemies. Oglan Gala, or the 'Young Man’s Castle,' is thought to have served as a fort that protected the royal complex. The two structures showcase the architectural ingenuity of the builders during the Sassanian era and subsequent Islamic periods. The architecture utilizes mud bricks and is characterized by the unique corrugated design, which provides additional strength to the walls. These ancient fortresses speak volumes about the history of the Merv oasis, which was once a significant trade center and a key city along the Silk Road. The forts have been subject to numerous invasions and changes of power over the centuries.