Mystery surrounds why the owners of a North Wales castle would build a reservoir underneath the lawn.
The reservoir at Penrhyn Castle at Llandygai near Bangor could hold 200,000 gallons of water and was fed from overflow pipes from the keep tanks that held water used for domestic purposes in the building.
One suggestion is that the reservoir was intended to provide water for use in case of fire.
The castle, which was owned in the 1840s by the Douglas-Pennant family, o… (View original article)