Cava Gran (Cava Arquejada) de la Serra de Mariola Monument · Agres, El Comtat, Alicante A former snow well built between the 17th and 18th centuries in the Serra de Mariola, used to produce ice until the early 20th century and notable today for a yew tree growing inside it. Photo: Viquipèdia / Wikimedia Commons (CC BY-SA) What to see and do in Agres