NPRNTeitlMath O SaflePerthynasNPRN85830TeitlHill's Tramroad: Pwll Du TunnelMath O Saflen/aPerthynasPart ofNPRN91590TeitlBlaenavon World Heritage Site AreaMath O Saflen/aPerthynasPart ofNPRN85860TeitlHill's TramroadMath O Saflen/aPerthynasPart ofNPRN85831TeitlHill's Tramroad: Pwll Du Tunnel South PortalMath O Saflen/aPerthynasAssociated withNPRN91754TeitlHill's Tramroad: Pwll Du Tunnel North East PortalMath O Saflen/aPerthynasAssociated with
