1. The Shark
Buy!
Source: thinkgeek.com2. The Rocket
DIY!
Source: blog.makezine.com3. The Milk Carton
By these designers, but not yet on the market.
Source: design-milk.com4. The Surreptitious Tank
Discontinued, but worth a DIY!
Source: curiobot.net5. The Woodsy Cabin
Buy!
Source: fab.com6. The Jungle Paradise
Buy!
Source: b3-bond.com7. The Ghetto Blaster
Looks pretty easy to DIY.
Source: geekalerts.com8. The Elegant "Cattino"
Buy!
Source: moderncat.net9. The Royal Box
DIY.
Source: fiascocircus10. The Spherical Lair
Buy!
Source: moderncat.net11. The "Starfruit" House
Source: moderncat.net12. The Grassy Tower
DIY in Finnish.
Source: moderncat.net13. The Schoolhouse
Buy!
Source: etsy.com14. The Teepee
Buy!
Source: us.loyalluxe.com15. The Ikea Tent
Originally $7 from Ikea, but sadly no longer available.
Source: retrolife.typepad.com16. The Modernist Cube
Buy!
Source: modernistcat.com17. The Derpy Fish
Buy this sewing pattern to DIY.
Source: etsy.com18. The Mario Tube
Buy!
Source: etsy.com19. The Dome
Buy!
Source: inhabitat.com20. The Vintage Television Set
DIY!
Source: moderncat.net21. The Tassled Cabana
Buy!
Source: topito.com22. The Leo Kempf
Attempt an ambitious DIY.
Source: leokempf.com23. The Dark Tower
DIY!
Source: uersugredu24. The Rooftop Garden
Buy!
Source: poussecreative.com25. The Nest
Only 980 Euros to pamper your basic tiger cub.
Source: homebasic.de26. The Hammock House
Buy!
Source: catabove.com27. The Hand-Blown Glass Den
Currently unavailable, much to the relief of most cats.
Source: moderncat.wordpress.com28. The TARDIS
DIY for the highly skilled.
Source: tardisbuilders.com29. The Cat Tube
Buy!
Source: brinsea.com30. The "Kitty Meow"
Buy!
Source: mydesiredhome.com31. The Cottage Tower