The Rhymney Valley Ridgeway Walk starts at Rhymney and heads south down the Rhymney Valley where it becomes a circular loop and runs around the Caerphilly basin linking the three main upland ridges of Mynydd-y-Grug, Thornhill and Eglwysilan and passes through Caerphilly, Bedwas, Hengoed, Rudry and Machen. The highest point on the route is Mynydd Machen at 300 metres. The landscape is full of industrial archaeology, reclaimed industrial sites and new light industry to replace the heavy coal industry of old. The area also has castles such as Caerphilly Castle and Ruperra Castle, prehistoric and Roman age sites. n conclusion the Rhymney Valley Ridgeway Walk offers a mix of demanding upland walking, panoramic views and varied sites of interest to explore.