The caves below Nottingham Castle, UK including Mortimer's Hole, The River Leen ran below the castle in Medieval times and probably would have been used as a quick way in to the castle. Visited with Graham in
Beneath Nottingham Castle, there is a labyrinth of man-made sandstone caves and tunnels that are strongly related to the famous legends of Robin Hood, who was said to use them to escape the Sherriff of Nottingham. <<<There's a Nottingham Castle?
The cave homes of Guyaju (Guyaju meaning, ancient cliff dwelling) are about northwest of Beijing, China. They were occupied during China's Tang Dynasty (AD by the Xiyi people. There are over 100 homes carved in to the hillside.