Hundertwasserhaus is an apartment building located in Vienna, Austria, designed by the artist and architect Friedensreich Hundertwasser. Completed in 1985, it is known for its colorful facade, irregular shapes, and integration of nature, featuring trees growing from balconies and a green roof. The building reflects Hundertwasser's philosophy of harmony between humans and nature. Its vibrant tiles and uneven floors create a unique living environment, attracting both residents and tourists. Hundertwasserhaus stands as a symbol of creative architecture and environmental awareness in urban design.