Catagorize: Other religious & spiritural sites
Contact: Dhamma Sala temple, Tambon Dhamma Sala, 6 Kms. to the east of Phra Pathom Chedi, on the South-side of Petchakasem Road, Amphoe Mueang, Nakhon Pathom Tel. 66 3475 2847-8
Located at Dhamma Sala Temple, it is a hill with an opening tunnel that is believed to connect Wat Phra Mayn to Wat Dhamma Sala. From hearsay, there are valuable treasures like ancient pottery underneath but hidden by a treasure guardian spirit.