Twmbarlwm, also known as Twm Barlwm, Twyn Barlwm or locally known as the Twmp (translation: hump), the Nipple or the Pimple because of the mound that lies at its summit, is a hill situated to the northeast of Risca in South Wales. It is often mistakenly referred to as a mountain but is actually a hill due to being under . It is high and is a well-known landmark throughout the region. It commands extensive views across what is now the M4 corridor, over Newport and Cwmbran - with part of it coming into Cwmbran - and out over the Bristol Channel.