100 o Olygfeydd Hynod Cymru

Author: Dyfed Elis-Gruffydd <br> <br> ISBN: 9781847719898 <br> Publication Date: 19 November 2014 <br> Publisher: Y Lolfa, Tal-y-bont <br> Format: Paperback, 235x240 mm, 312 pages <br> Language: Welsh <br> <br> A rich, colour illustrated volume, with relevant text, which guides readers around some of Wales's most remarkable locations, from the Penrhyn slate quarries in north Wales to the underground Dan yr Ogof caves in south Wales.