Llanllawer holy well, also known as Ffynnon Gapan, is located some 40m north-east of St David's Church, Llanllawer. Thought to have been constructed for bodily immersion, the well reportedly had a reputation for its miraculous healing properties, and was especially renowned for curing sore eyes. Coins and pins were reputedly thrown into the well as offerings, and bent pins were thrown in as curses.

The stone well chamber is a Scehduled Ancient Monument. It measures some 3.5m x 1.5m, and the chamber is corbelled to a pointed arch. In 1966 the well was noted to have dried up.

Sources include:
Jones, F, 1992, The Holy Wells of Wales

N Vousden, RCAHMW, 30 May 2013