Merv was sacked by the Mongols.
Several cities existed on this site.
The site of Ancient Merv has been listed by the UNESCO as one of the World Heritage Sites.
... Census Bureau, the town has a total area of 23.8 km² (9.2 mi²). 23.5 km² (9.1 mi²) of it is land and 0.3 km² (0.1 mi²) of it is water. The ...