Hidden gems of Downhill demesne and Mussenden Temple
It's one of Northern Ireland's best known landmarks, perched dramatically on the edge of the cliff 120 ft above the Atlantic Ocean.
Mussenden Temple attracts thousands of visitors every year and more recently has been the venue for a number of weddings.
The National Trust has now placed the temple and the Downhill Demesne on its list of priorities.
An archaeological dig on the site has revealed many hidden gems as BBC Newsline's Sarah Travers has been finding out.