This looks like a palace but it's a stepwell with an amazing and well preserved sculptural decoration
This postcard was sent by Nagi
Rani ki vav, or Ran-ki vav (Queen’s step well) was constructed during the rule of the Chaulukya dynasty. It is generally assumed that it was built in the memory of Bhima I (r. c. 1022–1064) by his widowed queen Udayamati and probably completed by Udayamati and Karna after his death. A reference to Udayamati building the monument is in Prabandha Chintamani, composed by the Jain monk Merunga Suri in 1304 AD.