Xanadu, China

Xanadu, also known as Shengdu, was a city in Inner Mongolia, China that may be home to one of the ten surviving gargoyle clans.

Thanks to Samuel Taylor Coleridge's poem, Xanadu, Xanadu is often used as a metaphor for opulence. Presumably for this reason, David Xanatos' upstate retreat is also called Xanadu.