Devon Falls  Devon Falls, known as the 'Veil of the Valley', is a waterfall in Sri Lanka, situated west of Talawakele, Nuwara Eliya District on the A7 highway. The falls is named after a pioneer English coffee planter called Devon, whose plantation was situated nearby the falls. The waterfall is high and is the 19th highest in the country. The falls are formed by a tributary of Kothmale Oya, which is a tributary of Mahaweli River. The elevation of Devon Falls is above sea level.