A UNESCO card from the Philippines
The Puerto Princesa Subterranean River National Park is located about 50 kilometres north of the city of Puerto Princesa, Palawan. The National Park is located in the Saint Paul Mountain Range on the northern coast of the island. Puerto Princesa Subterranean River National Park was nominated for the "New Seven Wonders of Nature" Competition.
From what I know, it has entered the Finalists list.
If you want to vote, you can do it here.
The two bird stamps were issued in 2009 in a set of 40 different ones.