Alwen Reservoir, located near Denbigh, was built in the early 20th century to supply water to Birkenhead. It offers a variety of walking and cycling trails, including the family-friendly Alwen Trail with picturesque views of the reservoir and surrounding mountains. Visitors can also explore the Hafod Elwy Moor National Nature Reserve and enjoy facilities at the nearby Llyn Brenig visitor centre. Just remember to watch out for falling trees and branches, especially after recent windy weather!