Nimis by Lars Vilks in his self-proclaimed micronation Ladonia. Photo by Erik Daugaard.
Ladonia.
Ladonia is a micronation, proclaimed in 1996 as the result of a years-long court battle between artist Lars Vilks and local authorities over three sculptures. The claimed territory is located in (its proponents prefer to say "next to") southern Sweden. It contains two sculptures, and was created in protest of Swedish authorities who wished to remove them. Ladonia is not recognized by any other accredited state, and acknowledging international law, there is no legal basis for calling it a state.
You can become a citizen:
http://www.ladonia.net.