Rodin's Thinker is pondering even harder than usual as he sits astride a toilet at what has been dubbed the world's first theme park dedicated to the humble restroom - a monument to one South Korean man's vision.

The park, located about an hour outside of Seoul in the city of Suwon - otherwise known as the home of Samsung Electronics - centers around a toilet-shaped museum building that was once the home of Sim Jae-duck, founder and first president of the World Toilet Association.

Legend has it that Sim, a former Suwon mayor who made his fortune with a metal products business and was dubbed "Mr Toilet," was born in his impoverished grandmother's outhouse.