St Michael's Mount replacing the pack horses which had previously been used. Its steep gradient renders it unsafe for passenger-use, thus The National Trust has made it out-of-bounds for public access. The causeway between the mount and Marazion was improved in 1879 by raising it by with sand and stones from the surrounding area. Repairs were completed in March 2016 following damage from the 2014 winter storms. Some studies indicate that any rise in ocean waters as well as existing natural erosion would put some of the Cornwall coast at risk, including St. Michael's Mount. Until recent times both the mount and the
Theydon Mount derives from the hill which it is located. Theydon Mount has been called "Theydon Paulyn", "Theydon Lessington", and "Theydon Briwes" in the past. The names from the former lords of the manor. The name Thoydon Mount has also been used. Theydon Bois, Garnon and Mount were recorded in the Domesday Book as "Taindena"/"Teidana". Hill Hall is a Grade I Listed country house. It was built in 1557-8 for Sir Thomas Smith. Theydon Mount has a church called St Michael which was completed in 1614 by Sir William Smith and is Grade I Listed. The original church was St Michael and