For overall gracious living, however, you really can't beat Snoopy's doghouse. Of course, he adds an element of personal sophistication and panache to his home that you aren't going to find with someone like, say, Oscar the Grouch, who is clearly a hoarder and probably in need of some kind of intervention:
Oscar the Grouch's trash can: "While appearing to be the size of a normal trash can, Oscar's residence is actually larger inside than the exterior would suggest, as evidenced by the fact that Oscar has noted through the years that it boasts such amenities as a farm, swimming pool, bowling alley, and a piano. Other items include Slimey, Oscar's pet worm; Fluffy, Oscar's pet elephant; Oscar's shoes; and a dimension gate to Grouchland, Oscar's homeworld."
The TARDIS: "The TARDIS (Time And Relative Dimension(s) In Space) is a time machine and spacecraft in the British science fiction television programme Doctor Who. A properly maintained and piloted TARDIS can transport its occupants to any point in time and space. The interior of a TARDIS is much larger than its exterior, which can blend in with its surroundings through the ship's "chameleon circuit". In the series, the Doctor pilots an unreliable, obsolete Type 40 TARDIS, whose chameleon circuit is faulty, leaving it locked in the shape of a 1950s-style London police box after a visit to London in 1963.
"The unpredictability of the TARDIS's short-range guidance—short relative to the size of the Universe—has often been a plot point in the Doctor's travels. Although "TARDIS" is a type of craft, rather than a specific one, the Doctor's TARDIS is usually referred to as "the" TARDIS or, in some of the earlier serials, just as "the ship", "the capsule" or even "the police box". Doctor Who has become so much a part of British popular culture that not only has the shape of the police box become more immediately associated with the TARDIS than with its real-world inspiration, the word "TARDIS" has been used to describe anything that seems bigger on the inside than on the outside."
Snoopy's doghouse: "Despite Snoopy's tendency to stay outside in all weather (in some cases even allowing snow to accumulate on his supine body, or wearing a snorkel when it rains), a running gag established that the interior of Snoopy's doghouse was something extraordinary. It defied physics, being dramatically larger on the inside than the outside, with a carpeted foyer, a den, a library, a guest room, a stairway and a basement.
"The interior was decorated with several pricey acquisitions including a painting by Van Gogh, first mentioned on February 29, 1964. After the fire destroyed the Van Gogh, it was replaced by an Andrew Wyeth. At various times the interior of Snoopy's doghouse also held bunk beds, a pool table, a table tennis table, a television, a mural (painted by Linus), a shower, a cedar closet, a grandfather clock, and a whirlpool bath."
Descriptions from www.wikipedia.org.