An upside down house

Look at this house lol...I've never seen a house like this before. It's my first time to see a house like this hehehe. I was amazed when I saw it and confused why did they build the house like this. But according to them this upside down house is seen in Trassenheide, Germany, Thursday, Sept. 4, 2008. The house was built to enable an alternative view on everyday life for visitors. Oh well, this house is very amazing. What do you think?