Tintern Abbey, founded by Cistercian monks in 1131 AD in the reign of Henry I. Built between 1270 and 1301 the Abbey had four hundred monks living here. In 1536 the Abbey suffered in the dissolution of the monasteries under Henry VIII. Depending on your policital and religious leanings at the time, in 1536 the Abbey was rightly and honourably dismantled as a result of its corruption and herecy. It fell into decay (unsurprisingly). Around 1760 the site was cleaned up and in some histories it is singularly responsible for the instigation of interest in the countryside. Turner and Wordsworth both liked the place.