Bohol Island, designated as a UNESCO Global Geopark, is likewise represented. The stamps also feature sites included in UNESCO’s Man and the Biosphere Programme: the Puerto Galera, Palawan, Albay and Apayao biosphere reserves.
Philippine documentary heritage, included in the UNESCO Memory of the World Programme, also finds a place in the designs. Featured are the Philippine paleographs — the Hanunuo Mangyan, Buhid Mangyan, Tagbanua, and Pala’wan scripts — the Doctrina Christiana en Lengua Española y Tagala, and the Hinilawod Epic Chant Recordings.
For Henares, the bulul, the carved wooden figure of the Ifugao, represents Baguio City, while a bowl of La Paz batchoy represents Iloilo City. Both cities belong to the UNESCO Creative Cities Network. While Baguio is traditionally home to Kankanaey and Ibaloy peoples, it has drawn people of different ethnic backgrounds, including the Ifugao.
The stamps further celebrate the country’s biodiversity through images of animals and plants found in Philippine World Heritage sites. These include the Philippine eagle, Tubbataha black noddy, rufous hornbill, Luzon hornbill, pitcher plants, short-haired slipper orchid, reef manta ray, whale shark and green sea turtle.
Aside from the country’s cultural and natural heritage, the stamps also represent the broader work of UNACOM.
“Represented by two classroom scenes is the education sector of UNACOM,” Henares explained. “In the field of education, UNACOM advocates quality and inclusive educational development at all levels, from preschool to higher education and beyond, as well as gender equality, global citizenship, and lifelong learning.”
He also highlighted UNACOM’s social and human sciences sector, which promotes collaborative research and intellectual discourse toward building a more inclusive, just, and sustainable global society.
“The sector also aims to develop international standards in tackling social transformations, with values resting on justice, freedom, and human dignity,” Henares said.
Accompanying the stamps is an informative souvenir folder containing complete lists of the Philippines’ UNESCO designations and inscriptions, as well as a map, designed by TeamManila, showing their locations.
Following the ceremonial unveiling, officials signed the official first day cover.
“As these stamps travel from one place to another, may they serve as reminders of our interconnectedness — that when we protect our flora and fauna, we also protect the delicate balance of life itself,” Santa Maria said. “Protecting the environment means protecting our nation and the future of the next generations.”
He expressed hope that the stamps would carry the message that the Philippines is rich not only in natural resources, but also in people who deeply value culture, nature and human connection.
Lazaro, meanwhile, reflected on the enduring significance of the postage stamp in an increasingly digital age.
“In our fast-paced digital world, where messages can vanish with a single swipe, there is something profoundly beautiful about a postage stamp,” she said. “These stamps are small works of art, but they carry immense weight. They are tangible anchors of our identity, memory, and shared history. They link our past achievements to our present endeavors, reminding us of who we are and what we stand for.”