Takht-e Rostam, Shahnameh

Takht-e Rostam is a stupa-monastery complex 2 km south of the town of Haibak. Built in the 4-5th century AD while the area was part of the Kushano-Sasanian Kingdom the complex is carved entirely from the bedrock and "consists of five chambers, two of them sanctuaries. One of them has a domed ceiling with an elaborate lotus leaf decoration. On an adjacent hill is the stupa, surmounted by a harmika, with several more rough caves around the base. A hoard of Ghaznavid coins was found by chance in one of the caves." Per Wikipedia