© Istockphoto| Casa Drina, Serbia

© Istockphoto|Meteora, Grecia

© Istockphoto|Casa Keret, Varsavia

© Istockphoto|House in the Clouds, Norfolk, Regno Unito

© Istockphoto|Strabag House, Bratislava

© Istockphoto| Monastero sospeso, Monte Heng, Cina

© Istockphoto| Palazzi storti, Santos, Brasile

© Istockphoto| Hobbit House, Matamata, Nuova Zelanda

© Istockphoto|Shoe House, Hellam, Pennsylvania

© Istockphoto|Upside Down House, Clifton a Niagara Falls, Ontario, Canada