Mwynglawdd Plwm Frongoch (Wemyss). Mwynglawdd plwm ym Mhontarfynach.

Mae delweddau a rennir gyda phrosiect Wicipics ar gael i'w defnyddio ar drwydded Creative Commons CC BY-SA 3.0.
https://creativecommons.org/licenses/by-sa/3.0/deed.en

Llun 1, gan Chris Popham: https://commons.wikimedia.org/wiki/File:Frongoch_Lead_Mine_(Wemyss).jpg

Llun 2, gan Chris Popham: https://commons.wikimedia.org/wiki/File:Frongoch_Lead_Mine_(Wemyss)_(1).jpg

Llun 3, gan Chris Popham: https://commons.wikimedia.org/wiki/File:Frongoch_Lead_Mine_(Wemyss)_(2).jpg