The Hundertwasserhaus is an apartment house in Vienna, Austria, built after the idea and concept of Austrian artist Friedensreich Hundertwasser with architect Joseph Krawina as a co-author.

The house is a mosaic of shapes, colors and pillars. The floors are uneven. The roof is carpeted with vegetation (900 tonnes of earth were used in constructing the terraces). 

There are various themed cafes and shops, as well as a small shops with posters, postcards, books and similar for sale. 

Take the U-Bahn to Schwedenplatz (lines U1 and U4). From Schwedenplatz take the tram number 1 in the direction to Prater Hauptallee. Exit the tram at Hetzgasse. From the tram stop at Hetzgasse walk about 2 minutes in the same direction. You should be standing in front of Hundertwasser Haus.