NPRNTeitlMath O SaflePerthynasNPRN91590TeitlBlaenavon World Heritage Site AreaMath O Saflen/aPerthynasPart ofNPRN85830TeitlHill's Tramroad: Pwll Du TunnelMath O Saflen/aPerthynasPart ofNPRN85860TeitlHill's TramroadMath O Saflen/aPerthynasPart ofNPRN85831TeitlHill's Tramroad: Pwll Du Tunnel South PortalMath O Saflen/aPerthynasAssociated withNPRN34976TeitlHill's Tramroad: Pwll Du Tunnel North PortalMath O Saflen/aPerthynasAssociated with
