the only organic National Trust garden in Wales. Other features St Aelrhiw's Church was built in 1860 on the footings of an earlier church. It consists of a small nave and short chancel, with aisles to the north and south, and has boulder built walls and a slate roof. The churchyard contains the graves of some of the many bodies that were washed up at Porth Neigwl during World War I. Capel Nebo was built in 1813 by the Congregationalists; the Wesleyan Methodists followed in 1832 at Capel Pisgah; and the Calvinistic Methodists at Capel Tan y Foel. Hen Felin, an ancient mill, stood close to the shoreline at Porth Neigwl, and was referred to in a Crown survey of 1352. A second mill stood above Plas yn Rhiw, fed by the holy well at Ffynnon Aelrhiw. Bwlch y Garreg Wen, built in 1731, is a typical agricultural worker's house of the period. It has one door, roughly in the centre of one long side, which is flanked by two small windows. The cottage has two bedrooms, one above the other, and a ladder would have been used to reach the upper room. This type of dwelling, known as a croglofft cottage, was to be found throughout the Llŷn Peninsula. Tyn y Graig was built at the beginning of the 18th century, and is constructed of uncoursed boulders. It was originally thatched, but a slate roof was later substituted. It has two tall square capped chimneys, and contains a dairy with a loft above. Meillionydd Fawr dates from 1616, and is to the west of Mynydd Rhiw. It is a three-storey building with boulder-built walls and a modern slate roof, which was much altered in the 19th century. Bryn Gwynt and Pen yr Ogof are examples of "Moonlight Cottages". In the 17th and 18th centuries it was common for young couples to squat on land; if they were able to build a cottage over night and have smoke coming from the chimney by dawn, they could keep both the house and surrounding land. Birdlife is abundant around the village, with common blackbirds, European robins, dunnocks, Eurasian wrens and both the song and mistle thrush. Eurasian curlews nest in boggy patches and northern lapwings can be seen in the fields. European greenfinches, linnets, common whitethroats, common chaffinches and willow warblers all nest in the gorse bushes that flank the sheep pastures,