It is crowned by a sparkling glass pyramid restaurant atop a sky-level Park Hyatt hotel.

Slowly, an idea began to grow - I will use my pen to write about the beauty of a living river, to revive the crystal clear Lanxi River and realize its dream of joining the ocean.

On my desk, a glass of water has caught the afternoon light, and I'm still looking for wonders.

Beginning in a crystal clear lagoon at the mouth of a limestone karst cave on the Philippine island of Palawan, the Puerto Princesa Subterranean River is the world's largest underground river.

"It was filtered in processing because North American shoppers want their honey crystal clear, " he said.