Church of Our Saviour on the Spilled Blood, St Petersburg, Russia. As a ghost, I am looking for a castle to haunt. What about this one? I know it isn't technically a 'castle' but look at its magnificent size! I think it would still be splendid to haunt.
More on the glass igloos! -- Hotel Kakslauttanen in Finland has log cabins and snow igloos as well as some unbelievable glass igloos that provide a one of a kind opportunity to view the northern lights and millions of stars in a crystal clear sky.
Italy - Lake Como: Wisteria Blues Wisteria marks the height of spring in Lake Como, Italy. From Wiki: Lake Como is a lake of glacial origin in Lombardy, Italy. One of the most beautiful lakes in Italy.