13th Century Salisbury Cathedral, Salisbury, England (Only four original 1215 copies of Magna Carta remain and a visit to view perhaps the best preserved of these in Salisbury Cathedral's Chapter House is for many visitors the highlight of their time here. which I can attest to having seen it for myself)
Salisbury Cathedral has the tallest church spire in the United Kingdom (123m/404 ft). Visitors can take the "Tower Tour" where the interior of the hollow spire, with its ancient wood scaffolding, can be viewed. The cathedral also has the largest cloister and the largest cathedral close in Britain (80 acres). The cathedral contains the world's oldest working clock (from AD 1386) and has the best surviving of the four original copies of the Magna Carta.