Agam kuan, Patna

Agam Kuan, which means "unfathomable well", is said to date back to the period of Maurya emperor, Ashoka. The well is located east of Patna, Bihar state, India. Agam Kuan is 105' deep, circular in plan, with a diameter extending over 20'2". The well is brick-encased in the upper half of its depth (down to 44') and thereafter, secured by a series of wooden rings. The surface structure, which now covers the well and forms its most distinctive feature, has eight arched windows.