This is the USS Enterprise and Romulan Bird of Prey cat tree built by Instructables user hatstand4510 for her cat, Saavik. I flipped through the instructions, and, honestly, I feel like it's something even you could build. Granted yours will collapse the first time your cat ever tries jumping on it, but I only said you could build it, not that you could build it well. You will try repairing it, but your cat will never come near the thing again -- the damage has been done.
Hit the jump for a couple more shots.
Thanks to Elizabeth, who built an entire Star Wars battle cat tree complete with X-wings, TIE fighters, and a Star Destroyer.