Climb to the rooftop of the massive east gatehouse, from where you can see the rings of stone and water defences that made Caerphilly so impressive.
Dringwch i ben to’r porthdy dwyreiniol enfawr, ble gallwch weld y cylchoedd o amddiffynfeydd carreg a dŵr a achosodd i Gaerffili fod mor drawiadol.