A post office issued postcard showing the limestone pinnacles of Gunung Mulu in Mulu National Park, Sarawak. This national park is listed as UNESCO World Heritage Site using its official name, "Gunung Mulu National Park." Thanks Matthew.
A 50 sen stamp on Gunung Mulu from the same issue of this postcard was used. It was cancelled at Miri on 18.2.2015.