[1] Both Clwt y bont and Deiniolen were built in the early 19th century to house workers in the Dinorwig slate quarry.

Clwt y Bont seems relatively unplanned, and has the short terraces built into the slope typical of early Gwynedd industrial settlement.

[4] The novelist Ann Harriet Hughes (1852–1910) married a doctor in Clwt-y-bont, where she lived for a period.

[5] The large Pentre Helen Housing Estate was built in the late 1930s, and had the effect of linking Deiniolen and Clwt y Bont into one village.

[7] There are many sites for boulder climbers on the hillside between the Fachwen road and Clwt y Bont.