Upside-Down House, Poland. via This Old House: "This structure was built by Polish philanthropist and designer Daniel Czapiewski to serve as a constant reminder of "wrong-doings against humanity" and the backwardness of the world."
Shell house. It is the most original house in Mexico or maybe in the world. It is one of the most beautiful houses you will surely enjoy. It is located in Isla Mujeres northeast of Yucatan peninsula in the Caribbean Sea.