The open water area of 1.7 km2 is surrounded by a wetland covering 4.1 km2, including paddy fields.

According to local folklore, from the very beginning Nong Han played a part in the story of Phadaeng and Nang Ai.

But hopes were dashed when only the rockets of her uncles made it aloft, and her father called the whole thing off.

Naga Prince Pangkhii shape-shifted into a white squirrel to spy on Nang Ai, but she saw him and had him killed by a royal hunter.

Aroused from the deep, he and his watery myrmidons rose and turned the land into a vast swamp of which Nong Han is a remnant.